wxGUI: sync message formatting with releasebranch

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@66064 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/core/toolboxes.py

@@ -628,7 +628,7 @@ def _loadMetadata(module):
     try:
         task = gtask.parse_interface(module)
     except ScriptError as e:
-        sys.stderr.write("%s\n%s\n" % (module, e))
+        sys.stderr.write("%s: %s\n" % (module, e))
         return '', ''
 
     return task.get_description(full=True), \