message: Fix parameter naming in docstring and quote it.
diff: @@ -391,7 +391,7 @@ def rename(oldname, newname, overwrite=False):
  Args:
  oldname: string, pathname for a file
  newname: string, pathname to which the file needs to be moved
  - overwrite: boolean, if false its an error for newpath to be occupied by an
  + overwrite: boolean, if false its an error for `newname` to be occupied by an
  existing file.
  Raises:
  