[tools/versionConv] Save multivals w/o whitespace

Author: mpsonntag

odml/tools/version_converter.py

@@ -303,7 +303,7 @@ def _handle_properties(self, root):
 
                 if value.text:
                     if main_val.text:
-                        main_val.text += ", " + value.text.strip()
+                        main_val.text += "," + value.text.strip()
                         multiple_values = True
                     else:
                         main_val.text = value.text.strip()