Merge pull request #274 from PavelSindler/MK2

gcode correction in first layer calibration

Firmware/ultralcd.cpp

@@ -937,7 +937,7 @@ void lcd_commands()
 			enquecommand_P(PSTR("G21")); //set units to millimeters
 			enquecommand_P(PSTR("G90")); //use absolute coordinates
 			enquecommand_P(PSTR("M83")); //use relative distances for extrusion
-			enquecommand_P(PSTR("G1 E - 1.50000 F2100.00000"));
+			enquecommand_P(PSTR("G1 E-1.50000 F2100.00000"));
 			enquecommand_P(PSTR("G1 Z0.150 F7200.000"));
 			enquecommand_P(PSTR("M204 S1000")); //set acceleration
 			enquecommand_P(PSTR("G1 F4000"));