Update pins comments

Marlin/src/pins/mega/pins_WANHAO_ONEPLUS.h

@@ -26,7 +26,7 @@
  */
 
 #ifndef __AVR_ATmega2560__
-  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
+  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
 #endif
 
 #define BOARD_NAME           "Wanhao i3 Mini 0ne+"

Marlin/src/pins/ramps/pins_FORMBOT_RAPTOR.h

@@ -30,7 +30,7 @@
 #endif
 
 #if HOTENDS > 3 || E_STEPPERS > 3
-  #error "Formbot supports up to 3 hotends / E-steppers. Comment this line to keep going."
+  #error "Formbot supports up to 3 hotends / E-steppers. Comment out this line to continue."
 #endif
 
 #define BOARD_NAME           "Formbot Raptor"

Marlin/src/pins/ramps/pins_FORMBOT_TREX2PLUS.h

@@ -30,7 +30,7 @@
 #endif
 
 #if HOTENDS > 2 || E_STEPPERS > 2
-  #error "Formbot supports up to 2 hotends / E-steppers. Comment this line to keep going."
+  #error "Formbot supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 
 #define BOARD_NAME           "Formbot"

Marlin/src/pins/ramps/pins_FORMBOT_TREX3.h

@@ -30,7 +30,7 @@
 #endif
 
 #if HOTENDS > 2 || E_STEPPERS > 2
-  #error "Formbot supports up to 2 hotends / E-steppers. Comment this line to keep going."
+  #error "Formbot supports up to 2 hotends / E-steppers. Comment out this line to continue."
 #endif
 
 #define BOARD_NAME           "Formbot"