change preprocessor to split lines

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

@@ -78,13 +78,11 @@ def insert(filename, docname):
 def parse(inputstring):
     "parse(inputstring): returns a parsed output string"
     print("preprocessing...")
-    print(inputstring)
     PathLog.track(inputstring)
     # split the input by line
     lines = inputstring.split("\n")
-    output = ""
+    output = [] #""
     lastcommand = None
-    print(lines)
 
     for lin in lines:
         # remove any leftover trailing and preceding spaces
@@ -96,7 +94,7 @@ def parse(inputstring):
             # remove line numbers
             lin = lin.split(" ", 1)
             if len(lin) >= 1:
-                lin = lin[1]
+                lin = lin[1].strip()
             else:
                 continue
 
@@ -105,7 +103,8 @@ def parse(inputstring):
             continue
         if lin[0].upper() in ["G", "M"]:
             # found a G or M command: we store it
-            output += lin + "\n"
+            #output += lin + "\n"
+            output.append(lin) # + "\n"
             last = lin[0].upper()
             for c in lin[1:]:
                 if not c.isdigit():
@@ -115,10 +114,10 @@ def parse(inputstring):
             lastcommand = last
         elif lastcommand:
             # no G or M command: we repeat the last one
-            output += lastcommand + " " + lin + "\n"
+            output.append(lastcommand + " " + lin) # + "\n"
 
     print("done preprocessing.")
     return output
 
 
-print(__name__ + " gcode preprocessor loaded.")
+print(__name__ + " gcode preprocessor loaded.")