Reduce string duplication

Marlin/src/MarlinCore.cpp

 PGMSTR(SP_P_STR, " P");  PGMSTR(SP_T_STR, " T");
 PGMSTR(X_STR,     "X");  PGMSTR(Y_STR,     "Y");  PGMSTR(Z_STR,     "Z");  PGMSTR(E_STR,     "E");
 PGMSTR(X_LBL,     "X:"); PGMSTR(Y_LBL,     "Y:"); PGMSTR(Z_LBL,     "Z:"); PGMSTR(E_LBL,     "E:");
+PGMSTR(SP_A_STR, " A");  PGMSTR(SP_B_STR, " B");  PGMSTR(SP_C_STR, " C");
 PGMSTR(SP_X_STR, " X");  PGMSTR(SP_Y_STR, " Y");  PGMSTR(SP_Z_STR, " Z");  PGMSTR(SP_E_STR, " E");
 PGMSTR(SP_X_LBL, " X:"); PGMSTR(SP_Y_LBL, " Y:"); PGMSTR(SP_Z_LBL, " Z:"); PGMSTR(SP_E_LBL, " E:");
 

Marlin/src/MarlinCore.h

 #endif
 
 extern const char NUL_STR[], M112_KILL_STR[], G28_STR[], M21_STR[], M23_STR[], M24_STR[],
+                  SP_A_STR[], SP_B_STR[], SP_C_STR[],
                   SP_P_STR[], SP_T_STR[], SP_X_STR[], SP_Y_STR[], SP_Z_STR[], SP_E_STR[],
                   X_LBL[], Y_LBL[], Z_LBL[], E_LBL[], SP_X_LBL[], SP_Y_LBL[], SP_Z_LBL[], SP_E_LBL[];

Marlin/src/gcode/bedlevel/G35.cpp

     const float z_probed_height = probe.probe_at_point(screws_tilt_adjust_pos[i], PROBE_PT_RAISE, 0, true);
 
     if (isnan(z_probed_height)) {
-      SERIAL_ECHOLNPAIR("G35 failed at point ", int(i), " (", tramming_point_name[i], ")"
-                        " X", screws_tilt_adjust_pos[i].x,
-                        " Y", screws_tilt_adjust_pos[i].y);
+      SERIAL_ECHOPAIR("G35 failed at point ", int(i), " (", tramming_point_name[i], ")");
+      SERIAL_ECHOLNPAIR_P(SP_X_STR, screws_tilt_adjust_pos[i].x, SP_Y_STR, screws_tilt_adjust_pos[i].y);
       err_break = true;
       break;
     }
 
-    if (DEBUGGING(LEVELING))
-      DEBUG_ECHOLNPAIR("Probing point ", int(i), " (", tramming_point_name[i], ")"
-                       " X", screws_tilt_adjust_pos[i].x,
-                       " Y", screws_tilt_adjust_pos[i].y,
-                       " Z", z_probed_height);
+    if (DEBUGGING(LEVELING)) {
+      DEBUG_ECHOPAIR("Probing point ", int(i), " (", tramming_point_name[i], ")");
+      SERIAL_ECHOLNPAIR_P(SP_X_STR, screws_tilt_adjust_pos[i].x, SP_Y_STR, screws_tilt_adjust_pos[i].y, SP_Z_STR, z_probed_height);
+    }
 
     z_measured[i] = z_probed_height;
   }

Marlin/src/gcode/config/M217.cpp

 
   #if ENABLED(TOOLCHANGE_FILAMENT_SWAP)
     serialprintPGM(eeprom ? PSTR("  M217") : PSTR("Toolchange:"));
-    SERIAL_ECHOPAIR(" S", LINEAR_UNIT(toolchange_settings.swap_length),
-                    " B", LINEAR_UNIT(toolchange_settings.extra_resume));
-    SERIAL_ECHOPAIR_P(SP_E_STR, LINEAR_UNIT(toolchange_settings.extra_prime),
+    SERIAL_ECHOPAIR(" S", LINEAR_UNIT(toolchange_settings.swap_length));
+    SERIAL_ECHOPAIR_P(SP_B_STR, LINEAR_UNIT(toolchange_settings.extra_resume),
+                      SP_E_STR, LINEAR_UNIT(toolchange_settings.extra_prime),
                       SP_P_STR, LINEAR_UNIT(toolchange_settings.prime_speed));
     SERIAL_ECHOPAIR(" R", LINEAR_UNIT(toolchange_settings.retract_speed),
                     " U", LINEAR_UNIT(toolchange_settings.unretract_speed),

Marlin/src/gcode/queue.cpp

       while (NUMERIC_SIGNED(*p))
         SERIAL_ECHO(*p++);
     }
-    SERIAL_ECHOPAIR_P(SP_P_STR, int(planner.moves_free()));
-    SERIAL_ECHOPAIR(" B", int(BUFSIZE - length));
+    SERIAL_ECHOPAIR_P(SP_P_STR, int(planner.moves_free()),
+                      SP_B_STR, int(BUFSIZE - length));
   #endif
   SERIAL_EOL();
 }

Marlin/src/lcd/language/language_en.h

   PROGMEM Language_Str MSG_SETTINGS_STORED                 = _UxGT("Settings Stored");
   PROGMEM Language_Str MSG_MEDIA_UPDATE                    = _UxGT("Media Update");
   PROGMEM Language_Str MSG_RESET_PRINTER                   = _UxGT("Reset Printer");
-  PROGMEM Language_Str MSG_REFRESH                         = LCD_STR_REFRESH  _UxGT("Refresh");
+  PROGMEM Language_Str MSG_REFRESH                         = LCD_STR_REFRESH _UxGT("Refresh");
   PROGMEM Language_Str MSG_INFO_SCREEN                     = _UxGT("Info Screen");
   PROGMEM Language_Str MSG_PREPARE                         = _UxGT("Prepare");
   PROGMEM Language_Str MSG_TUNE                            = _UxGT("Tune");

Marlin/src/module/configuration_store.cpp

       CONFIG_ECHO_HEADING("Material heatup parameters:");
       LOOP_L_N(i, PREHEAT_COUNT) {
         CONFIG_ECHO_START();
-        SERIAL_ECHOLNPAIR(
-          "  M145 S", (int)i
+        SERIAL_ECHOLNPAIR_P(
+          PSTR("  M145 S"), (int)i
           #if HAS_HOTEND
-            , " H", TEMP_UNIT(ui.material_preset[i].hotend_temp)
+            , PSTR(" H"), TEMP_UNIT(ui.material_preset[i].hotend_temp)
           #endif
           #if HAS_HEATED_BED
-            , " B", TEMP_UNIT(ui.material_preset[i].bed_temp)
+            , SP_B_STR, TEMP_UNIT(ui.material_preset[i].bed_temp)
           #endif
           #if HAS_FAN
-            , " F", ui.material_preset[i].fan_speed
+            , PSTR(" F"), ui.material_preset[i].fan_speed
           #endif
         );
       }
             , PSTR(" D"), unscalePID_d(PID_PARAM(Kd, e))
           );
           #if ENABLED(PID_EXTRUSION_SCALING)
-            SERIAL_ECHOPAIR(" C", PID_PARAM(Kc, e));
+            SERIAL_ECHOPAIR_P(SP_C_STR, PID_PARAM(Kc, e));
             if (e == 0) SERIAL_ECHOPAIR(" L", thermalManager.lpq_len);
           #endif
           #if ENABLED(PID_FAN_SCALING)

Marlin/src/module/delta.cpp

 
 #define DELTA_DEBUG(VAR) do { \
     SERIAL_ECHOLNPAIR_P(PSTR("Cartesian X"), VAR.x, SP_Y_STR, VAR.y, SP_Z_STR, VAR.z); \
-    SERIAL_ECHOLNPAIR("Delta A", delta.a, " B", delta.b, " C", delta.c); \
+    SERIAL_ECHOLNPAIR_P(PSTR("Delta A"), delta.a, SP_B_STR, delta.b, SP_C_STR, delta.c); \
   }while(0)
 
 void inverse_kinematics(const xyz_pos_t &raw) {

Marlin/src/module/temperature.cpp

 
     SERIAL_ECHOPAIR_F(" R", t.series_res, 1);
     SERIAL_ECHOPAIR_F_P(SP_T_STR, t.res_25, 1);
-    SERIAL_ECHOPAIR_F(" B", t.beta, 1);
-    SERIAL_ECHOPAIR_F(" C", t.sh_c_coeff, 9);
+    SERIAL_ECHOPAIR_F_P(SP_B_STR, t.beta, 1);
+    SERIAL_ECHOPAIR_F_P(SP_C_STR, t.sh_c_coeff, 9);
     SERIAL_ECHOPGM(" ; ");
     serialprintPGM(
       TERN_(HEATER_0_USER_THERMISTOR, t_index == CTI_HOTEND_0 ? PSTR("HOTEND 0") :)