Add line return if semi column to prevent comment

[Jodaille]

Hello,

a small patch to add a line return (\n) if Tool command contains a semi column.

So that we can specify a delay:

M3 S3000;G4 P0.5;

G4 P0.5 will not be commented in Gcode

G1 F6000.0 X-107.666667 Y83.250000;
M3 S3000;
G4 P0.5;