Enclose all #error strings with apostrophes

Marlin/Conditionals.h

   #endif
 
   #if TEMP_SENSOR_1 <= -2
-    #error MAX6675 / MAX31855 Thermocouples not supported for TEMP_SENSOR_1
+    #error "MAX6675 / MAX31855 Thermocouples not supported for TEMP_SENSOR_1"
   #elif TEMP_SENSOR_1 == -1
     #define HEATER_1_USES_AD595
   #elif TEMP_SENSOR_1 == 0
   #endif
 
   #if TEMP_SENSOR_2 <= -2
-    #error MAX6675 / MAX31855 Thermocouples not supported for TEMP_SENSOR_2
+    #error "MAX6675 / MAX31855 Thermocouples not supported for TEMP_SENSOR_2"
   #elif TEMP_SENSOR_2 == -1
     #define HEATER_2_USES_AD595
   #elif TEMP_SENSOR_2 == 0
   #endif
 
   #if TEMP_SENSOR_3 <= -2
-    #error MAX6675 / MAX31855 Thermocouples not supported for TEMP_SENSOR_3
+    #error "MAX6675 / MAX31855 Thermocouples not supported for TEMP_SENSOR_3"
   #elif TEMP_SENSOR_3 == -1
     #define HEATER_3_USES_AD595
   #elif TEMP_SENSOR_3 == 0
   #endif
 
   #if TEMP_SENSOR_BED <= -2
-    #error MAX6675 / MAX31855 Thermocouples not supported for TEMP_SENSOR_BED
+    #error "MAX6675 / MAX31855 Thermocouples not supported for TEMP_SENSOR_BED"
   #elif TEMP_SENSOR_BED == -1
     #define BED_USES_AD595
   #elif TEMP_SENSOR_BED == 0

Marlin/Marlin.h

 #include "pins.h"
 
 #ifndef SANITYCHECK_H
-  #error Your Configuration.h and Configuration_adv.h files are outdated!
+  #error "Your Configuration.h and Configuration_adv.h files are outdated!"
 #endif
 
 #include "Arduino.h"

Marlin/MarlinSerial.h

   #define RX_BUFFER_SIZE 128
 #endif
 #if !((RX_BUFFER_SIZE == 256) ||(RX_BUFFER_SIZE == 128) ||(RX_BUFFER_SIZE == 64) ||(RX_BUFFER_SIZE == 32) ||(RX_BUFFER_SIZE == 16) ||(RX_BUFFER_SIZE == 8) ||(RX_BUFFER_SIZE == 4) ||(RX_BUFFER_SIZE == 2))
-  #error RX_BUFFER_SIZE has to be a power of 2 and >= 2
+  #error "RX_BUFFER_SIZE has to be a power of 2 and >= 2"
 #endif
 
 struct ring_buffer {

Marlin/Marlin_main.cpp

    */
   #if ENABLED(Z_MIN_PROBE_ENDSTOP)
     #if !HAS_Z_MIN_PROBE_PIN
-      #error You must define Z_MIN_PROBE_PIN to enable Z probe repeatability calculation.
+      #error "You must define Z_MIN_PROBE_PIN to enable Z probe repeatability calculation."
     #endif
   #elif !HAS_Z_MIN
-    #error You must define Z_MIN_PIN to enable Z probe repeatability calculation.
+    #error "You must define Z_MIN_PIN to enable Z probe repeatability calculation."
   #endif
 
   /**

Marlin/SanityCheck.h

  * action to proceed with compilation in such environments.
  */
 #if !defined(ARDUINO) || ARDUINO < 10600
-  #error Versions of Arduino IDE prior to 1.6.0 are no longer supported, please update your toolkit.
+  #error "Versions of Arduino IDE prior to 1.6.0 are no longer supported, please update your toolkit."
 #endif
 
 /**
  * Marlin release, version and default string
  */
 #ifndef SHORT_BUILD_VERSION
-  #error SHORT_BUILD_VERSION Information must be specified
+  #error "SHORT_BUILD_VERSION Information must be specified"
 #endif
 
 #ifndef DETAILED_BUILD_VERSION
-  #error BUILD_VERSION Information must be specified
+  #error "BUILD_VERSION Information must be specified"
 #endif
 
 #ifndef STRING_DISTRIBUTION_DATE
-  #error STRING_DISTRIBUTION_DATE Information must be specified
+  #error "STRING_DISTRIBUTION_DATE Information must be specified"
 #endif
 
 #ifndef PROTOCOL_VERSION
-  #error PROTOCOL_VERSION Information must be specified
+  #error "PROTOCOL_VERSION Information must be specified"
 #endif
 
 #ifndef MACHINE_NAME
-  #error MACHINE_NAME Information must be specified
+  #error "MACHINE_NAME Information must be specified"
 #endif
 
 #ifndef SOURCE_CODE_URL
-  #error SOURCE_CODE_URL Information must be specified
+  #error "SOURCE_CODE_URL Information must be specified"
 #endif
 
 #ifndef DEFAULT_MACHINE_UUID
-  #error DEFAULT_MACHINE_UUID Information must be specified
+  #error "DEFAULT_MACHINE_UUID Information must be specified"
 #endif
 
 #ifndef WEBSITE_URL
-  #error WEBSITE_URL Information must be specified
+  #error "WEBSITE_URL Information must be specified"
 #endif
 
 /**
  * Dual Stepper Drivers
  */
 #if ENABLED(Z_DUAL_STEPPER_DRIVERS) && ENABLED(Y_DUAL_STEPPER_DRIVERS)
-  #error You cannot have dual stepper drivers for both Y and Z.
+  #error "You cannot have dual stepper drivers for both Y and Z."
 #endif
 
 /**
  */
 #if ENABLED(LCD_PROGRESS_BAR)
   #if DISABLED(SDSUPPORT)
-    #error LCD_PROGRESS_BAR requires SDSUPPORT.
+    #error "LCD_PROGRESS_BAR requires SDSUPPORT."
   #endif
   #if ENABLED(DOGLCD)
-    #error LCD_PROGRESS_BAR does not apply to graphical displays.
+    #error "LCD_PROGRESS_BAR does not apply to graphical displays."
   #endif
   #if ENABLED(FILAMENT_LCD_DISPLAY)
-    #error LCD_PROGRESS_BAR and FILAMENT_LCD_DISPLAY are not fully compatible. Comment out this line to use both.
+    #error "LCD_PROGRESS_BAR and FILAMENT_LCD_DISPLAY are not fully compatible. Comment out this line to use both."
   #endif
 #endif
 
  */
 #if ENABLED(BABYSTEPPING)
   #if DISABLED(ULTRA_LCD)
-    #error BABYSTEPPING requires an LCD controller.
+    #error "BABYSTEPPING requires an LCD controller."
   #endif
   #if ENABLED(SCARA)
-    #error BABYSTEPPING is not implemented for SCARA yet.
+    #error "BABYSTEPPING is not implemented for SCARA yet."
   #endif
   #if ENABLED(DELTA) && ENABLED(BABYSTEP_XY)
-    #error BABYSTEPPING only implemented for Z axis on deltabots.
+    #error "BABYSTEPPING only implemented for Z axis on deltabots."
   #endif
 #endif
 
  * Filament Change with Extruder Runout Prevention
  */
 #if ENABLED(FILAMENTCHANGEENABLE) && ENABLED(EXTRUDER_RUNOUT_PREVENT)
-  #error EXTRUDER_RUNOUT_PREVENT currently incompatible with FILAMENTCHANGE.
+  #error "EXTRUDER_RUNOUT_PREVENT currently incompatible with FILAMENTCHANGE."
 #endif
 
 /**
 #if EXTRUDERS > 1
 
   #if EXTRUDERS > 4
-    #error The maximum number of EXTRUDERS in Marlin is 4.
+    #error "The maximum number of EXTRUDERS in Marlin is 4."
   #endif
 
   #if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
-    #error EXTRUDERS must be 1 with TEMP_SENSOR_1_AS_REDUNDANT.
+    #error "EXTRUDERS must be 1 with TEMP_SENSOR_1_AS_REDUNDANT."
   #endif
 
   #if ENABLED(HEATERS_PARALLEL)
-    #error EXTRUDERS must be 1 with HEATERS_PARALLEL.
+    #error "EXTRUDERS must be 1 with HEATERS_PARALLEL."
   #endif
 
   #if ENABLED(Y_DUAL_STEPPER_DRIVERS)
-    #error EXTRUDERS must be 1 with Y_DUAL_STEPPER_DRIVERS.
+    #error "EXTRUDERS must be 1 with Y_DUAL_STEPPER_DRIVERS."
   #endif
 
   #if ENABLED(Z_DUAL_STEPPER_DRIVERS)
-    #error EXTRUDERS must be 1 with Z_DUAL_STEPPER_DRIVERS.
+    #error "EXTRUDERS must be 1 with Z_DUAL_STEPPER_DRIVERS."
   #endif
 
 #endif // EXTRUDERS > 1
  * Limited number of servos
  */
 #if NUM_SERVOS > 4
-  #error The maximum number of SERVOS in Marlin is 4.
+  #error "The maximum number of SERVOS in Marlin is 4."
 #endif
 #if defined(NUM_SERVOS) && NUM_SERVOS > 0
   #if X_ENDSTOP_SERVO_NR >= 0 || Y_ENDSTOP_SERVO_NR >= 0 || Z_ENDSTOP_SERVO_NR >= 0
     #if X_ENDSTOP_SERVO_NR >= NUM_SERVOS
-      #error X_ENDSTOP_SERVO_NR must be smaller than NUM_SERVOS.
+      #error "X_ENDSTOP_SERVO_NR must be smaller than NUM_SERVOS."
     #elif Y_ENDSTOP_SERVO_NR >= NUM_SERVOS
-      #error Y_ENDSTOP_SERVO_NR must be smaller than NUM_SERVOS.
+      #error "Y_ENDSTOP_SERVO_NR must be smaller than NUM_SERVOS."
     #elif Z_ENDSTOP_SERVO_NR >= NUM_SERVOS
-      #error Z_ENDSTOP_SERVO_NR must be smaller than NUM_SERVOS.
+      #error "Z_ENDSTOP_SERVO_NR must be smaller than NUM_SERVOS."
     #endif
   #endif
 #endif
  * Servo deactivation depends on servo endstops
  */
 #if ENABLED(DEACTIVATE_SERVOS_AFTER_MOVE) && !HAS_SERVO_ENDSTOPS
-  #error At least one of the ?_ENDSTOP_SERVO_NR is required for DEACTIVATE_SERVOS_AFTER_MOVE.
+  #error "At least one of the ?_ENDSTOP_SERVO_NR is required for DEACTIVATE_SERVOS_AFTER_MOVE."
 #endif
 
 /**
  * Required LCD language
  */
 #if DISABLED(DOGLCD) && ENABLED(ULTRA_LCD) && !defined(DISPLAY_CHARSET_HD44780)
-  #error You must set DISPLAY_CHARSET_HD44780 to JAPANESE, WESTERN or CYRILLIC for your LCD controller.
+  #error "You must set DISPLAY_CHARSET_HD44780 to JAPANESE, WESTERN or CYRILLIC for your LCD controller."
 #endif
 
 /**
  * Bed Heating Options - PID vs Limit Switching
  */
 #if ENABLED(PIDTEMPBED) && ENABLED(BED_LIMIT_SWITCHING)
-  #error To use BED_LIMIT_SWITCHING you must disable PIDTEMPBED.
+  #error "To use BED_LIMIT_SWITCHING you must disable PIDTEMPBED."
 #endif
 
 /**
  */
 #if ENABLED(MESH_BED_LEVELING)
   #if ENABLED(DELTA)
-    #error MESH_BED_LEVELING does not yet support DELTA printers.
+    #error "MESH_BED_LEVELING does not yet support DELTA printers."
   #endif
   #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #error Select AUTO_BED_LEVELING_FEATURE or MESH_BED_LEVELING, not both.
+    #error "Select AUTO_BED_LEVELING_FEATURE or MESH_BED_LEVELING, not both."
   #endif
   #if MESH_NUM_X_POINTS > 7 || MESH_NUM_Y_POINTS > 7
-    #error MESH_NUM_X_POINTS and MESH_NUM_Y_POINTS need to be less than 8.
+    #error "MESH_NUM_X_POINTS and MESH_NUM_Y_POINTS need to be less than 8."
   #endif
 #elif ENABLED(MANUAL_BED_LEVELING)
-  #error MESH_BED_LEVELING is required for MANUAL_BED_LEVELING.
+  #error "MESH_BED_LEVELING is required for MANUAL_BED_LEVELING."
 #endif
 
 /**
    * A probe needs a pin
    */
   #if !PROBE_PIN_CONFIGURED
-    #error A probe needs a pin! Use Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN or Z_MIN_PROBE_PIN.
+    #error "A probe needs a pin! Use Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN or Z_MIN_PROBE_PIN."
   #endif
 
   /**
    * Z_MIN_PIN and Z_MIN_PROBE_PIN can't co-exist when Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN
    */
   #if HAS_Z_MIN && HAS_Z_MIN_PROBE_PIN && ENABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN)
-    #error A probe cannot have more than one pin! Use Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN or Z_MIN_PROBE_PIN.
+    #error "A probe cannot have more than one pin! Use Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN or Z_MIN_PROBE_PIN."
   #endif
 
   /**
    * Make sure the plug is enabled if it's used
    */
   #if ENABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN) && DISABLED(USE_ZMIN_PLUG)
-    #error You must enable USE_ZMIN_PLUG if any probe or endstop is connected to the ZMIN plug.
+    #error "You must enable USE_ZMIN_PLUG if any probe or endstop is connected to the ZMIN plug."
   #endif
 
   /**
   #if (ENABLED(FIX_MOUNTED_PROBE) && (ENABLED(MECHANICAL_PROBE) || HAS_Z_ENDSTOP_SERVO || ENABLED(Z_PROBE_SLED))) \
        || (ENABLED(MECHANICAL_PROBE) && (HAS_Z_ENDSTOP_SERVO || ENABLED(Z_PROBE_SLED))) \
        || (HAS_Z_ENDSTOP_SERVO && ENABLED(Z_PROBE_SLED))
-    #error Please define only one type of probe: Z Servo, MECHANICAL_PROBE, Z_PROBE_ALLEN_KEY, Z_PROBE_SLED, or FIX_MOUNTED_PROBE.
+    #error "Please define only one type of probe: Z Servo, MECHANICAL_PROBE, Z_PROBE_ALLEN_KEY, Z_PROBE_SLED, or FIX_MOUNTED_PROBE."
   #endif
 
   /**
   #elif ENABLED(Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN) && ENABLED(DISABLE_Z_MIN_PROBE_ENDSTOP)
     #error "Don't enable DISABLE_Z_MIN_PROBE_ENDSTOP with Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN."
   #elif ENABLED(DISABLE_Z_MIN_PROBE_ENDSTOP) && DISABLED(Z_MIN_PROBE_ENDSTOP)
-    #error DISABLE_Z_MIN_PROBE_ENDSTOP requires Z_MIN_PROBE_ENDSTOP to be set.
+    #error "DISABLE_Z_MIN_PROBE_ENDSTOP requires Z_MIN_PROBE_ENDSTOP to be set."
   #endif
 
   /**
     #endif
     // Forcing Servo definitions can break some hall effect sensor setups. Leaving these here for further comment.
     //#ifndef NUM_SERVOS
-    //  #error You must have NUM_SERVOS defined and there must be at least 1 configured to use Z_MIN_PROBE_ENDSTOP.
+    //  #error "You must have NUM_SERVOS defined and there must be at least 1 configured to use Z_MIN_PROBE_ENDSTOP."
     //#endif
     //#if defined(NUM_SERVOS) && NUM_SERVOS < 1
-    //  #error You must have at least 1 servo defined for NUM_SERVOS to use Z_MIN_PROBE_ENDSTOP.
+    //  #error "You must have at least 1 servo defined for NUM_SERVOS to use Z_MIN_PROBE_ENDSTOP."
     //#endif
     //#if Z_ENDSTOP_SERVO_NR < 0
-    //  #error You must have Z_ENDSTOP_SERVO_NR set to at least 0 or above to use Z_MIN_PROBE_ENDSTOP.
+    //  #error "You must have Z_ENDSTOP_SERVO_NR set to at least 0 or above to use Z_MIN_PROBE_ENDSTOP."
     //#endif
     //#ifndef SERVO_ENDSTOP_ANGLES
-    //  #error You must have SERVO_ENDSTOP_ANGLES defined for Z Extend and Retract to use Z_MIN_PROBE_ENDSTOP.
+    //  #error "You must have SERVO_ENDSTOP_ANGLES defined for Z Extend and Retract to use Z_MIN_PROBE_ENDSTOP."
     //#endif
   #endif
 
    * Require some kind of probe for bed leveling
    */
   #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #error AUTO_BED_LEVELING_FEATURE requires a probe! Define a Z Servo, MECHANICAL_PROBE, Z_PROBE_ALLEN_KEY, Z_PROBE_SLED, or FIX_MOUNTED_PROBE.
+    #error "AUTO_BED_LEVELING_FEATURE requires a probe! Define a Z Servo, MECHANICAL_PROBE, Z_PROBE_ALLEN_KEY, Z_PROBE_SLED, or FIX_MOUNTED_PROBE."
   #endif
 
 #endif
   #if !PIN_EXISTS(Z_MIN)
     #if !PIN_EXISTS(Z_MIN_PROBE) || (DISABLED(Z_MIN_PROBE_ENDSTOP) || ENABLED(DISABLE_Z_MIN_PROBE_ENDSTOP)) // It's possible for someone to set a pin for the Z probe, but not enable it.
       #if ENABLED(Z_MIN_PROBE_REPEATABILITY_TEST)
-        #error You must have a Z_MIN or Z_PROBE endstop to enable Z_MIN_PROBE_REPEATABILITY_TEST.
+        #error "You must have a Z_MIN or Z_PROBE endstop to enable Z_MIN_PROBE_REPEATABILITY_TEST."
       #else
-        #error AUTO_BED_LEVELING_FEATURE requires a Z_MIN or Z_PROBE endstop. Z_MIN_PIN or Z_MIN_PROBE_PIN must point to a valid hardware pin.
+        #error "AUTO_BED_LEVELING_FEATURE requires a Z_MIN or Z_PROBE endstop. Z_MIN_PIN or Z_MIN_PROBE_PIN must point to a valid hardware pin."
       #endif
     #endif
   #endif
     #ifndef DELTA_PROBEABLE_RADIUS
       // Be sure points are in the right order
       #if LEFT_PROBE_BED_POSITION > RIGHT_PROBE_BED_POSITION
-        #error LEFT_PROBE_BED_POSITION must be less than RIGHT_PROBE_BED_POSITION.
+        #error "LEFT_PROBE_BED_POSITION must be less than RIGHT_PROBE_BED_POSITION."
       #elif FRONT_PROBE_BED_POSITION > BACK_PROBE_BED_POSITION
-        #error FRONT_PROBE_BED_POSITION must be less than BACK_PROBE_BED_POSITION.
+        #error "FRONT_PROBE_BED_POSITION must be less than BACK_PROBE_BED_POSITION."
       #endif
       // Make sure probing points are reachable
       #if LEFT_PROBE_BED_POSITION < MIN_PROBE_X
  * Filament Width Sensor
  */
 #if ENABLED(FILAMENT_WIDTH_SENSOR) && !HAS_FILAMENT_WIDTH_SENSOR
-  #error FILAMENT_WIDTH_SENSOR requires a FILWIDTH_PIN to be defined.
+  #error "FILAMENT_WIDTH_SENSOR requires a FILWIDTH_PIN to be defined."
 #endif
 
 
  * ULTIPANEL encoder
  */
 #if ENABLED(ULTIPANEL) && DISABLED(NEWPANEL) && DISABLED(SR_LCD_2W_NL) && !defined(SHIFT_CLK)
-  #error ULTIPANEL requires some kind of encoder.
+  #error "ULTIPANEL requires some kind of encoder."
 #endif
 
 #if ENCODER_PULSES_PER_STEP < 0
-  #error ENCODER_PULSES_PER_STEP should not be negative, use REVERSE_MENU_DIRECTION instead
+  #error "ENCODER_PULSES_PER_STEP should not be negative, use REVERSE_MENU_DIRECTION instead"
 #endif
 
 /**
   #if ENABLED(AUTO_BED_LEVELING_FEATURE)
 
     #if DISABLED(AUTO_BED_LEVELING_GRID)
-      #error Only AUTO_BED_LEVELING_GRID is supported with DELTA.
+      #error "Only AUTO_BED_LEVELING_GRID is supported with DELTA."
     #endif
 
     #if ENABLED(Z_PROBE_SLED)
-      #error You cannot use Z_PROBE_SLED with DELTA.
+      #error "You cannot use Z_PROBE_SLED with DELTA."
     #endif
 
   #endif
  * Allen Key Z probe requires Auto Bed Leveling grid and Delta
  */
 #if ENABLED(Z_PROBE_ALLEN_KEY) && !(ENABLED(AUTO_BED_LEVELING_GRID) && ENABLED(DELTA))
-  #error Invalid use of Z_PROBE_ALLEN_KEY.
+  #error "Invalid use of Z_PROBE_ALLEN_KEY."
 #endif
 
 /**
       || !HAS_X2_ENABLE || !HAS_X2_STEP || !HAS_X2_DIR \
       || !defined(X2_HOME_POS) || !defined(X2_MIN_POS) || !defined(X2_MAX_POS) \
       || !HAS_X_MAX
-    #error Missing or invalid definitions for DUAL_X_CARRIAGE mode.
+    #error "Missing or invalid definitions for DUAL_X_CARRIAGE mode."
   #endif
   #if X_HOME_DIR != -1 || X2_HOME_DIR != 1
-    #error Please use canonical x-carriage assignment.
+    #error "Please use canonical x-carriage assignment."
   #endif
 #endif // DUAL_X_CARRIAGE
 
 #if HAS_AUTO_FAN
   #if HAS_FAN0
     #if EXTRUDER_0_AUTO_FAN_PIN == FAN_PIN
-      #error You cannot set EXTRUDER_0_AUTO_FAN_PIN equal to FAN_PIN.
+      #error "You cannot set EXTRUDER_0_AUTO_FAN_PIN equal to FAN_PIN."
     #elif EXTRUDER_1_AUTO_FAN_PIN == FAN_PIN
-      #error You cannot set EXTRUDER_1_AUTO_FAN_PIN equal to FAN_PIN.
+      #error "You cannot set EXTRUDER_1_AUTO_FAN_PIN equal to FAN_PIN."
     #elif EXTRUDER_2_AUTO_FAN_PIN == FAN_PIN
-      #error You cannot set EXTRUDER_2_AUTO_FAN_PIN equal to FAN_PIN.
+      #error "You cannot set EXTRUDER_2_AUTO_FAN_PIN equal to FAN_PIN."
     #elif EXTRUDER_3_AUTO_FAN_PIN == FAN_PIN
-      #error You cannot set EXTRUDER_3_AUTO_FAN_PIN equal to FAN_PIN.
+      #error "You cannot set EXTRUDER_3_AUTO_FAN_PIN equal to FAN_PIN."
     #endif
   #endif
 #endif
 
 #if HAS_FAN0 && CONTROLLERFAN_PIN == FAN_PIN
-  #error You cannot set CONTROLLERFAN_PIN equal to FAN_PIN.
+  #error "You cannot set CONTROLLERFAN_PIN equal to FAN_PIN."
 #endif
 
 #if HAS_CONTROLLERFAN
   #if EXTRUDER_0_AUTO_FAN_PIN == CONTROLLERFAN_PIN
-    #error You cannot set EXTRUDER_0_AUTO_FAN_PIN equal to CONTROLLERFAN_PIN.
+    #error "You cannot set EXTRUDER_0_AUTO_FAN_PIN equal to CONTROLLERFAN_PIN."
   #elif EXTRUDER_1_AUTO_FAN_PIN == CONTROLLERFAN_PIN
-    #error You cannot set EXTRUDER_1_AUTO_FAN_PIN equal to CONTROLLERFAN_PIN.
+    #error "You cannot set EXTRUDER_1_AUTO_FAN_PIN equal to CONTROLLERFAN_PIN."
   #elif EXTRUDER_2_AUTO_FAN_PIN == CONTROLLERFAN_PIN
-    #error You cannot set EXTRUDER_2_AUTO_FAN_PIN equal to CONTROLLERFAN_PIN.
+    #error "You cannot set EXTRUDER_2_AUTO_FAN_PIN equal to CONTROLLERFAN_PIN."
   #elif EXTRUDER_3_AUTO_FAN_PIN == CONTROLLERFAN_PIN
-    #error You cannot set EXTRUDER_3_AUTO_FAN_PIN equal to CONTROLLERFAN_PIN.
+    #error "You cannot set EXTRUDER_3_AUTO_FAN_PIN equal to CONTROLLERFAN_PIN."
   #endif
 #endif
 
  */
 #if EXTRUDERS > 3
   #if TEMP_SENSOR_3 == 0
-    #error TEMP_SENSOR_3 is required with 4 EXTRUDERS.
+    #error "TEMP_SENSOR_3 is required with 4 EXTRUDERS."
   #elif !HAS_HEATER_3
-    #error HEATER_3_PIN not defined for this board.
+    #error "HEATER_3_PIN not defined for this board."
   #elif !PIN_EXISTS(TEMP_3)
-    #error TEMP_3_PIN not defined for this board.
+    #error "TEMP_3_PIN not defined for this board."
   #elif !PIN_EXISTS(E3_STEP) || !PIN_EXISTS(E3_DIR) || !PIN_EXISTS(E3_ENABLE)
-    #error E3_STEP_PIN, E3_DIR_PIN, or E3_ENABLE_PIN not defined for this board.
+    #error "E3_STEP_PIN, E3_DIR_PIN, or E3_ENABLE_PIN not defined for this board."
   #endif
 #elif EXTRUDERS > 2
   #if TEMP_SENSOR_2 == 0
-    #error TEMP_SENSOR_2 is required with 3 or more EXTRUDERS.
+    #error "TEMP_SENSOR_2 is required with 3 or more EXTRUDERS."
   #elif !HAS_HEATER_2
-    #error HEATER_2_PIN not defined for this board.
+    #error "HEATER_2_PIN not defined for this board."
   #elif !PIN_EXISTS(TEMP_2)
-    #error TEMP_2_PIN not defined for this board.
+    #error "TEMP_2_PIN not defined for this board."
   #elif !PIN_EXISTS(E2_STEP) || !PIN_EXISTS(E2_DIR) || !PIN_EXISTS(E2_ENABLE)
-    #error E2_STEP_PIN, E2_DIR_PIN, or E2_ENABLE_PIN not defined for this board.
+    #error "E2_STEP_PIN, E2_DIR_PIN, or E2_ENABLE_PIN not defined for this board."
   #endif
 #elif EXTRUDERS > 1
   #if TEMP_SENSOR_1 == 0
-    #error TEMP_SENSOR_1 is required with 2 or more EXTRUDERS.
+    #error "TEMP_SENSOR_1 is required with 2 or more EXTRUDERS."
   #elif !PIN_EXISTS(TEMP_1)
-    #error TEMP_1_PIN not defined for this board.
+    #error "TEMP_1_PIN not defined for this board."
   #elif !PIN_EXISTS(E1_STEP) || !PIN_EXISTS(E1_DIR) || !PIN_EXISTS(E1_ENABLE)
-    #error E1_STEP_PIN, E1_DIR_PIN, or E1_ENABLE_PIN not defined for this board.
+    #error "E1_STEP_PIN, E1_DIR_PIN, or E1_ENABLE_PIN not defined for this board."
   #endif
 #endif
 
 #if EXTRUDERS > 1 || ENABLED(HEATERS_PARALLEL)
   #if !HAS_HEATER_1
-    #error HEATER_1_PIN not defined for this board.
+    #error "HEATER_1_PIN not defined for this board."
   #endif
 #endif
 
 #if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT) && TEMP_SENSOR_1 == 0
-  #error TEMP_SENSOR_1 is required with TEMP_SENSOR_1_AS_REDUNDANT.
+  #error "TEMP_SENSOR_1 is required with TEMP_SENSOR_1_AS_REDUNDANT."
 #endif
 
 #if !HAS_HEATER_0
-  #error HEATER_0_PIN not defined for this board.
+  #error "HEATER_0_PIN not defined for this board."
 #elif !PIN_EXISTS(TEMP_0)
-  #error TEMP_0_PIN not defined for this board.
+  #error "TEMP_0_PIN not defined for this board."
 #elif !PIN_EXISTS(E0_STEP) || !PIN_EXISTS(E0_DIR) || !PIN_EXISTS(E0_ENABLE)
-  #error E0_STEP_PIN, E0_DIR_PIN, or E0_ENABLE_PIN not defined for this board.
+  #error "E0_STEP_PIN, E0_DIR_PIN, or E0_ENABLE_PIN not defined for this board."
 #elif TEMP_SENSOR_0 == 0
-  #error TEMP_SENSOR_0 is required.
+  #error "TEMP_SENSOR_0 is required."
 #endif
 
 /**
  * Endstops
  */
 #if DISABLED(USE_XMIN_PLUG) && DISABLED(USE_XMAX_PLUG) && !(ENABLED(Z_DUAL_ENDSTOPS) && Z2_USE_ENDSTOP >= _XMAX_ && Z2_USE_ENDSTOP <= _XMIN_)
- #error You must enable USE_XMIN_PLUG or USE_XMAX_PLUG
+ #error "You must enable USE_XMIN_PLUG or USE_XMAX_PLUG"
 #elif DISABLED(USE_YMIN_PLUG) && DISABLED(USE_YMAX_PLUG) && !(ENABLED(Z_DUAL_ENDSTOPS) && Z2_USE_ENDSTOP >= _YMAX_ && Z2_USE_ENDSTOP <= _YMIN_)
- #error You must enable USE_YMIN_PLUG or USE_YMAX_PLUG
+ #error "You must enable USE_YMIN_PLUG or USE_YMAX_PLUG"
 #elif DISABLED(USE_ZMIN_PLUG) && DISABLED(USE_ZMAX_PLUG) && !(ENABLED(Z_DUAL_ENDSTOPS) && Z2_USE_ENDSTOP >= _ZMAX_ && Z2_USE_ENDSTOP <= _ZMIN_)
- #error You must enable USE_ZMIN_PLUG or USE_ZMAX_PLUG
+ #error "You must enable USE_ZMIN_PLUG or USE_ZMAX_PLUG"
 #elif ENABLED(Z_DUAL_ENDSTOPS) && !Z2_USE_ENDSTOP
- #error You must set Z2_USE_ENDSTOP with Z_DUAL_ENDSTOPS
+ #error "You must set Z2_USE_ENDSTOP with Z_DUAL_ENDSTOPS"
 #endif
 
 /**
  * Warnings for old configurations
  */
 #if WATCH_TEMP_PERIOD > 500
-  #error WATCH_TEMP_PERIOD now uses seconds instead of milliseconds.
+  #error "WATCH_TEMP_PERIOD now uses seconds instead of milliseconds."
 #elif DISABLED(THERMAL_PROTECTION_HOTENDS) && (defined(WATCH_TEMP_PERIOD) || defined(THERMAL_PROTECTION_PERIOD))
-  #error Thermal Runaway Protection for hotends is now enabled with THERMAL_PROTECTION_HOTENDS.
+  #error "Thermal Runaway Protection for hotends is now enabled with THERMAL_PROTECTION_HOTENDS."
 #elif DISABLED(THERMAL_PROTECTION_BED) && defined(THERMAL_PROTECTION_BED_PERIOD)
-  #error Thermal Runaway Protection for the bed is now enabled with THERMAL_PROTECTION_BED.
+  #error "Thermal Runaway Protection for the bed is now enabled with THERMAL_PROTECTION_BED."
 #elif ENABLED(COREXZ) && ENABLED(Z_LATE_ENABLE)
   #error "Z_LATE_ENABLE can't be used with COREXZ."
 #elif defined(X_HOME_RETRACT_MM)
-  #error [XYZ]_HOME_RETRACT_MM settings have been renamed [XYZ]_HOME_BUMP_MM.
+  #error "[XYZ]_HOME_RETRACT_MM settings have been renamed [XYZ]_HOME_BUMP_MM."
 #elif defined(PROBE_SERVO_DEACTIVATION_DELAY)
-  #error PROBE_SERVO_DEACTIVATION_DELAY has been replaced with DEACTIVATE_SERVOS_AFTER_MOVE and SERVO_DEACTIVATION_DELAY.
+  #error "PROBE_SERVO_DEACTIVATION_DELAY has been replaced with DEACTIVATE_SERVOS_AFTER_MOVE and SERVO_DEACTIVATION_DELAY."
 #elif defined(BEEPER)
-  #error BEEPER is now BEEPER_PIN. Please update your pins definitions.
+  #error "BEEPER is now BEEPER_PIN. Please update your pins definitions."
 #elif defined(SDCARDDETECT)
-  #error SDCARDDETECT is now SD_DETECT_PIN. Please update your pins definitions.
+  #error "SDCARDDETECT is now SD_DETECT_PIN. Please update your pins definitions."
 #elif defined(SDCARDDETECTINVERTED)
-  #error SDCARDDETECTINVERTED is now SD_DETECT_INVERTED. Please update your configuration.
+  #error "SDCARDDETECTINVERTED is now SD_DETECT_INVERTED. Please update your configuration."
 #elif defined(BTENABLED)
-  #error BTENABLED is now BLUETOOTH. Please update your configuration.
+  #error "BTENABLED is now BLUETOOTH. Please update your configuration."
 #elif defined(CUSTOM_MENDEL_NAME)
-  #error CUSTOM_MENDEL_NAME is now CUSTOM_MACHINE_NAME. Please update your configuration.
+  #error "CUSTOM_MENDEL_NAME is now CUSTOM_MACHINE_NAME. Please update your configuration."
 #elif defined(HAS_AUTOMATIC_VERSIONING)
-  #error HAS_AUTOMATIC_VERSIONING is now USE_AUTOMATIC_VERSIONING. Please update your configuration.
+  #error "HAS_AUTOMATIC_VERSIONING is now USE_AUTOMATIC_VERSIONING. Please update your configuration."
 #elif defined(ENABLE_AUTO_BED_LEVELING)
-  #error ENABLE_AUTO_BED_LEVELING is now AUTO_BED_LEVELING_FEATURE. Please update your configuration.
+  #error "ENABLE_AUTO_BED_LEVELING is now AUTO_BED_LEVELING_FEATURE. Please update your configuration."
 #elif defined(SDSLOW)
-  #error SDSLOW deprecated. Set SPI_SPEED to SPI_HALF_SPEED instead.
+  #error "SDSLOW deprecated. Set SPI_SPEED to SPI_HALF_SPEED instead."
 #elif defined(SDEXTRASLOW)
-  #error SDEXTRASLOW deprecated. Set SPI_SPEED to SPI_QUARTER_SPEED instead.
+  #error "SDEXTRASLOW deprecated. Set SPI_SPEED to SPI_QUARTER_SPEED instead."
 #elif defined(Z_RAISE_BEFORE_HOMING)
-  #error Z_RAISE_BEFORE_HOMING is deprecated. Use MIN_Z_HEIGHT_FOR_HOMING instead.
+  #error "Z_RAISE_BEFORE_HOMING is deprecated. Use MIN_Z_HEIGHT_FOR_HOMING instead."
 #elif defined(FILAMENT_SENSOR)
-  #error FILAMENT_SENSOR is deprecated. Use FILAMENT_WIDTH_SENSOR instead.
+  #error "FILAMENT_SENSOR is deprecated. Use FILAMENT_WIDTH_SENSOR instead."
 #elif defined(DISABLE_MAX_ENDSTOPS) || defined(DISABLE_MIN_ENDSTOPS)
-  #error DISABLE_MAX_ENDSTOPS and DISABLE_MIN_ENDSTOPS deprecated. Use individual USE_*_PLUG options instead.
+  #error "DISABLE_MAX_ENDSTOPS and DISABLE_MIN_ENDSTOPS deprecated. Use individual USE_*_PLUG options instead."
 #elif ENABLED(Z_DUAL_ENDSTOPS) && !defined(Z2_USE_ENDSTOP)
-  #error Z_DUAL_ENDSTOPS settings are simplified. Just set Z2_USE_ENDSTOP to the endstop you want to repurpose for Z2
+  #error "Z_DUAL_ENDSTOPS settings are simplified. Just set Z2_USE_ENDSTOP to the endstop you want to repurpose for Z2"
 #elif defined(LANGUAGE_INCLUDE)
-  #error LANGUAGE_INCLUDE has been replaced by LCD_LANGUAGE. Please update your configuration.
+  #error "LANGUAGE_INCLUDE has been replaced by LCD_LANGUAGE. Please update your configuration."
 #endif
 
 #endif //SANITYCHECK_H

Marlin/Sd2Card.cpp

   //------------------------------------------------------------------------------
   // make sure SPCR rate is in expected bits
   #if (SPR0 != 0 || SPR1 != 1)
-    #error unexpected SPCR bits
+    #error "unexpected SPCR bits"
   #endif
   /**
    * Initialize hardware SPI

Marlin/Sd2PinMap.h

   {&DDRG, &PING, &PORTG, 0}, // G0 50
 };
 #else  // defined(__AVR_ATmega1280__)
-#error unknown chip
+#error "unknown chip"
 #endif  // defined(__AVR_ATmega1280__)
 //------------------------------------------------------------------------------
 static const uint8_t digitalPinCount = COUNT(digitalPinMap);

Marlin/fastio.h

 #endif
 
 #ifndef DIO0_PIN
-  #error pins for this chip not defined in arduino.h! If you write an appropriate pin definition and have this firmware work on your chip, please submit a pull request
+  #error "pins for this chip not defined in arduino.h! If you write an appropriate pin definition and have this firmware work on your chip, please submit a pull request"
 #endif
 
 #endif /* _FASTIO_ARDUINO_H */

Marlin/pins.h

 #elif MB(SAINSMART_2IN1)
   #include "pins_SAINSMART_2IN1.h"
 #else
-  #error Unknown MOTHERBOARD value set in Configuration.h
+  #error "Unknown MOTHERBOARD value set in Configuration.h"
 #endif
 
 // List of pins which to ignore when asked to change by gcode, 0 and 1 are RX and TX, do not mess with those!

Marlin/pins_5DPRINT.h

  */
 
 #ifndef __AVR_AT90USB1286__
-  #error Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define DEFAULT_MACHINE_NAME "Makibox"

Marlin/pins_A4JP.h

  ************************************************/
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu."
 #endif
 
 // Servo support

Marlin/pins_BQ_ZUM_MEGA_3D.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops! Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu.
+  #error "Oops! Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu."
 #endif
 
 #include "pins_RAMPS_13.h"

Marlin/pins_BRAINWAVE.h

  */
 
 #ifndef __AVR_AT90USB646__
-  #error Oops!  Make sure you have 'Brainwave' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Brainwave' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define X_STEP_PIN         27

Marlin/pins_BRAINWAVE_PRO.h

  */
 
 #ifndef __AVR_AT90USB1286__
-  #error Oops!  Make sure you have 'Brainwave Pro' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Brainwave Pro' selected from the 'Tools -> Boards' menu."
 #endif
 
 #include "fastio.h"
 
 #ifndef AT90USBxx_TEENSYPP_ASSIGNMENTS  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin alphabetical.
-  #error  Uncomment #define AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h for this config
+  #error "Uncomment #define AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h for this config"
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_CHEAPTRONIC.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_ELEFU_3.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define X_STEP_PIN         49

Marlin/pins_GEN3_MONOLITHIC.h

  */
 
 #ifndef __AVR_ATmega644P__
-  #error Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define DEBUG_PIN 0

Marlin/pins_GEN3_PLUS.h

  */
 
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega1284P__)
-  #error Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define X_STEP_PIN         15

Marlin/pins_GEN6.h

 
 #ifndef __AVR_ATmega644P__
   #ifndef __AVR_ATmega1284P__
-    #error Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu.
+    #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
   #endif
 #endif
 

Marlin/pins_GEN7_12.h

  */
 
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__) && !defined(__AVR_ATmega1284P__)
-  #error Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu."
 #endif
 
 #ifndef GEN7_VERSION

Marlin/pins_GEN7_14.h

 #define GEN7_VERSION 14 // v1.4
 
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__) && !defined(__AVR_ATmega1284P__)
-  #error Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu."
 #endif
 
 //x axis pins

Marlin/pins_GEN7_CUSTOM.h

  */
 
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__) && !defined(__AVR_ATmega1284P__)
-  #error Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Gen7' selected from the 'Tools -> Boards' menu."
 #endif
 
 //x axis pins

Marlin/pins_LEAPFROG.h

  */
 
 #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define X_STEP_PIN         28

Marlin/pins_MEGACONTROLLER.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #if EXTRUDERS > 2
-  #error Mega Controller supports up to 2 extruders. Comment this line to keep going.
+  #error "Mega Controller supports up to 2 extruders. Comment this line to keep going."
 #endif
 
 #define SERVO0_PIN 30

Marlin/pins_MEGATRONICS.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_MEGATRONICS_2.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_MEGATRONICS_3.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_MINIRAMBO.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega 2560 or Rambo' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega 2560 or Rambo' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define LARGE_FLASH         true

Marlin/pins_MINITRONICS.h

  */
 
 #ifndef __AVR_ATmega1281__
-  #error Oops!  Make sure you have 'Minitronics' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Minitronics' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_OMCA.h

  */
 
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__)
-  #error Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu. (Final OMCA board)
+  #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu. (Final OMCA board)"
 #endif
 
 #define X_STEP_PIN         26

Marlin/pins_OMCA_A.h

  */
 
 #ifndef __AVR_ATmega644__
-  #error Oops!  Make sure you have 'SanguinoA' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'SanguinoA' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define X_STEP_PIN         21

Marlin/pins_PRINTRBOARD.h

  */
 
 #ifndef __AVR_AT90USB1286__
-  #error Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu."
 #endif
 
 #if ENABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS)  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin traditional.
-  #error These Printrboard assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h
+  #error "These Printrboard assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h"
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_PRINTRBOARD_REVF.h

  */
 
 #ifndef __AVR_AT90USB1286__
-  #error Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu."
 #endif
 
 #if ENABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS)  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin traditional.
-  #error These Printrboard assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h
+  #error "These Printrboard assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h"
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_RAMBO.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define LARGE_FLASH true

Marlin/pins_RAMPS_14.h

  */
 
 #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define LARGE_FLASH true

Marlin/pins_RAMPS_OLD.h

  */
 
 #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 // Uncomment the following line for RAMPS v1.0

Marlin/pins_RUMBA.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #if EXTRUDERS > 3
-  #error RUMBA supports up to 3 extruders. Comment this line to keep going.
+  #error "RUMBA supports up to 3 extruders. Comment this line to keep going."
 #endif
 
 #define DEFAULT_MACHINE_NAME "Rumba"

Marlin/pins_SANGUINOLOLU_11.h

  */
 
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega1284P__)
-  #error Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Sanguino' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define X_STEP_PIN         15

Marlin/pins_SAV_MKI.h

  */
 
 #ifndef __AVR_AT90USB1286__
-  #error Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define DEFAULT_MACHINE_NAME    "SAV MkI"

Marlin/pins_SETHI.h

  */
 
 #if !defined(__AVR_ATmega644P__) && !defined(__AVR_ATmega644__) && !defined(__AVR_ATmega1284P__)
-  #error Oops!  Make sure you have 'Sethi 3D' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Sethi 3D' selected from the 'Tools -> Boards' menu."
 #endif
 
 #ifndef GEN7_VERSION

Marlin/pins_TEENSY2.h

  */
 
 #ifndef __AVR_AT90USB1286__
-  #error Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu."
 #endif
 
 #ifndef AT90USBxx_TEENSYPP_ASSIGNMENTS  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin alphabetical.
-  #error  Uncomment #define AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h for this config
+  #error "Uncomment #define AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h for this config"
   // (or build from command line)
 #endif
 

Marlin/pins_TEENSYLU.h

  */
 
 #ifndef __AVR_AT90USB1286__
-  #error Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu."
 #endif
 
 #if ENABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS)  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin traditional.
-  #error These Teensylu assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h
+  #error "These Teensylu assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h"
 #endif
 
 #define LARGE_FLASH        true

Marlin/pins_ULTIMAIN_2.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error Oops!  Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega 2560' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define DEFAULT_MACHINE_NAME    "Ultimaker"

Marlin/pins_ULTIMAKER.h

  */
 
 #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define DEFAULT_MACHINE_NAME    "Ultimaker"

Marlin/pins_ULTIMAKER_OLD.h

  */
 
 #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
-  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
 #endif
 
 #define DEFAULT_MACHINE_NAME    "Ultimaker"

Marlin/thermistortables.h

   #define HEATER_0_TEMPTABLE_LEN COUNT(HEATER_0_TEMPTABLE)
 #else
   #ifdef HEATER_0_USES_THERMISTOR
-    #error No heater 0 thermistor table specified
+    #error "No heater 0 thermistor table specified"
   #else  // HEATER_0_USES_THERMISTOR
     #define HEATER_0_TEMPTABLE NULL
     #define HEATER_0_TEMPTABLE_LEN 0
   #define HEATER_1_TEMPTABLE_LEN COUNT(HEATER_1_TEMPTABLE)
 #else
   #ifdef HEATER_1_USES_THERMISTOR
-    #error No heater 1 thermistor table specified
+    #error "No heater 1 thermistor table specified"
   #else  // HEATER_1_USES_THERMISTOR
     #define HEATER_1_TEMPTABLE NULL
     #define HEATER_1_TEMPTABLE_LEN 0
   #define HEATER_2_TEMPTABLE_LEN COUNT(HEATER_2_TEMPTABLE)
 #else
   #ifdef HEATER_2_USES_THERMISTOR
-    #error No heater 2 thermistor table specified
+    #error "No heater 2 thermistor table specified"
   #else  // HEATER_2_USES_THERMISTOR
     #define HEATER_2_TEMPTABLE NULL
     #define HEATER_2_TEMPTABLE_LEN 0
   #define HEATER_3_TEMPTABLE_LEN COUNT(HEATER_3_TEMPTABLE)
 #else
   #ifdef HEATER_3_USES_THERMISTOR
-    #error No heater 3 thermistor table specified
+    #error "No heater 3 thermistor table specified"
   #else  // HEATER_3_USES_THERMISTOR
     #define HEATER_3_TEMPTABLE NULL
     #define HEATER_3_TEMPTABLE_LEN 0
   #define BEDTEMPTABLE_LEN COUNT(BEDTEMPTABLE)
 #else
   #ifdef BED_USES_THERMISTOR
-    #error No bed thermistor table specified
+    #error "No bed thermistor table specified"
   #endif // BED_USES_THERMISTOR
 #endif
 

Marlin/utf_mapper.h

   //          ヰ    ヱ    ヲ    ン    フ    ?    ?   ?    ?    ?    ヲ    ・    ー    ヽ    ヽ   ?
            };
     #elif ENABLED(MAPPER_D0D1)
-      #error( "Cyrillic on a japanese dsplay makes no sense. There are no matching symbols.");
+      #error "Cyrillic on a japanese dsplay makes no sense. There are no matching symbols."
     #endif
 
   #elif DISPLAY_CHARSET_HD44780 == WESTERN
   //          p    c    T    y    Ф    x    Ч    ч    Ш    Щ    Ъ    Ы    b    Э    Ю    Я
             };
     #elif ENABLED(MAPPER_E382E383)
-      #error( "Katakana on a western display makes no sense. There are no matching symbols." );
+      #error "Katakana on a western display makes no sense. There are no matching symbols."
     #endif
 
   #elif DISPLAY_CHARSET_HD44780 == CYRILLIC
              // ш    щ    ъ    ы    ь    э    ю    я      // 7  Ѱ ѱ Ѳ ѳ Ѵ ѵ Ѷ ѷ
              };                                           //    ѻ ѹ Ѻ ѻ Ѽ ѽ Ѿ ѿ
     #elif ENABLED(MAPPER_C2C3)
-      #error( "Western languages on a cyrillic display makes no sense. There are no matching symbols." );
+      #error "Western languages on a cyrillic display makes no sense. There are no matching symbols."
     #elif ENABLED(MAPPER_E382E383)
-      #error( "Katakana on a cyrillic display makes no sense. There are no matching symbols." );
+      #error "Katakana on a cyrillic display makes no sense. There are no matching symbols."
     #endif
   #else
-    #error("Something went wrong in the setting of DISPLAY_CHARSET_HD44780");
+    #error "Something went wrong in the setting of DISPLAY_CHARSET_HD44780"
   #endif // DISPLAY_CHARSET_HD44780
 #endif // SIMULATE_ROMFONT