bpo-35088: Update idlelib.help.copy_string docstring (GH-10164)


We now use git and backporting instead of hg and forward merging.
(cherry picked from commit 2b555fc1f07bee8b066a6d7da727e516f37e8e34)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
2 files changed