use input and output file instead stdin and stdout

test_data/test.gcode

@@ -1,26 +1 @@
-; None
-;SVG: With:10.0 Height:10.0
-G90 ;Absolute programming
-G21 ;Programming in millimeters (mm)
-M5  ;Disable laser
-; ------
-; Draw shapes
-;X: 0.053103756 Y: 0.053103756
-G1 X0.1 Y0.1
-M3 I S150 ;start laser
-;X: 0.053103756 Y: 0.053103756
-G1 X0.1 Y0.1
-;X: 9.946895956 Y: 0.053103756
-G1 X9.9 Y0.1
-;X: 9.946895956 Y: 9.946895956
-G1 X9.9 Y9.9
-;X: 0.0531037560000005 Y: 9.946895956
-G1 X0.1 Y9.9
-;X: 0.053103756 Y: 0.053103756
-G1 X0.1 Y0.1
-M5 ;stop laser
-; ------
-; Shape completed
-G1 X0.0 Y0.0; Display printbed
-M02 ;End of program
-; Generated 0 points
+Line01Line02