Add proportional font adjustment ratio

- update example configs

Marlin/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/Cartesio/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/Felix/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/FolgerTech-i3-2020/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/Hephestos/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/Hephestos_2/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/K8200/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/K8400/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/RigidBot/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/SCARA/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/TAZ4/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/TinyBoy2/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/WITBOX/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/delta/FLSUN/auto_calibrate/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/delta/FLSUN/kossel_mini/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/delta/generic/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/gCreate_gMax1.5+/Configuration_adv.h

  */
 #define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/makibox/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/example_configurations/wt150/Configuration_adv.h

  */
 //#define NO_WORKSPACE_OFFSETS
 
+/**
+ * This affects the way Marlin outputs blacks of spaces via serial connection by multiplying the number
+ * of spaces to be output by the ratio set below.  This allows for better alignment of output for commands
+ * like G29 O, which renders a mesh/grid.
+ *
+ * For clients that use a fixed-width font (like OctoPrint), leave this at 1.0; otherwise, adjust
+ * accordingly for your client and font.
+ */
+#define PROPORTIONAL_FONT_RATIO 1.0
+
 #endif // CONFIGURATION_ADV_H

Marlin/serial.cpp

 void serial_echopair_P(const char* s_P, double v)        { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_P(const char* s_P, unsigned long v) { serialprintPGM(s_P); SERIAL_ECHO(v); }
 
-void serial_spaces(uint8_t count) { while (count--) MYSERIAL.write(' '); }
+void serial_spaces(uint8_t count) { count *= (PROPORTIONAL_FONT_RATIO); while (count--) MYSERIAL.write(' '); }

Marlin/ubl.cpp

 
   void unified_bed_leveling::display_map(const int map_type) {
     const bool map0 = map_type == 0;
-    constexpr uint8_t spaces = 11 * (GRID_MAX_POINTS_X - 2);
+    constexpr uint8_t spaces = 9 * (GRID_MAX_POINTS_X - 2);
 
     if (map0) {
       SERIAL_PROTOCOLLNPGM("\nBed Topography Report:\n");
       serial_echo_xy(GRID_MAX_POINTS_X - 1, GRID_MAX_POINTS_Y - 1);
       SERIAL_EOL;
       serial_echo_xy(UBL_MESH_MIN_X, UBL_MESH_MAX_Y);
-      SERIAL_ECHO_SP(spaces - 3);
+      SERIAL_ECHO_SP(spaces);
       serial_echo_xy(UBL_MESH_MAX_X, UBL_MESH_MAX_Y);
       SERIAL_EOL;
     }
 
     if (map0) {
       serial_echo_xy(UBL_MESH_MIN_X, UBL_MESH_MIN_Y);
-      SERIAL_ECHO_SP(spaces + 1);
+      SERIAL_ECHO_SP(spaces + 4);
       serial_echo_xy(UBL_MESH_MAX_X, UBL_MESH_MIN_Y);
       SERIAL_EOL;
       serial_echo_xy(0, 0);