
Recently, the error message in _process_communicate_handle_oserror() has been i18n'ed, which caused the regression as another code path appended a string to it, which causes the TypeError to be raised. Fix it by using string formatting instead of '+' to force it to convert to string before concatenating. Closes-Bug: 1421652 Change-Id: I7229b46888f798ac4a69c140ab389afed49b8c3c