Fix for handling values of EDITOR which contain a space.

The shell swallows the 0th arg, which was the filename. Simple fix
is to pass in an extra arg for the shell to swallow.

Change-Id: Iad6304ba9ccea6e7262ee06ef87d3dac57dbde81

editor.py

@@ -82,7 +82,7 @@ least one of these before using this command."""
       fd = None
 
       if re.compile("^.*[$ \t'].*$").match(editor):
-        args = [editor + ' "$@"']
+        args = [editor + ' "$@"', 'sh']
         shell = True
       else:
         args = [editor]