Fixes for python 2to3 migration

src/Mod/Path/PathScripts/post/grbl_post.py

@@ -149,7 +149,7 @@ def export(objectslist,filename,argstring):
             print("the object " + obj.Name + " is not a path. Please select only path and Compounds.")
             return
 
-    print "postprocessing..."
+    print("postprocessing...")
     gcode = ""
 
     #Find the machine.
@@ -161,7 +161,7 @@ def export(objectslist,filename,argstring):
                 if p.Name == "Machine":
                     myMachine = p
     if myMachine is None:
-        print "No machine found in this project"
+        print("No machine found in this project")
     else:
         if myMachine.MachineUnits == "Metric":
            UNITS = "G21"
@@ -212,7 +212,7 @@ def export(objectslist,filename,argstring):
     else:
         final = gcode
 
-    print "done postprocessing."
+    print("done postprocessing.")
 
     gfile = pythonopen(filename,"wb")
     gfile.write(gcode)
@@ -301,5 +301,5 @@ def parse(pathobj):
         return out
 
 
-print __name__ + " gcode postprocessor loaded."
+print(__name__ + " gcode postprocessor loaded.")