[docs] [issue27779] Sync-up docstrings in C version of the the decimal module

Stefan Krah added the comment: Okay great. I think it's probably best to produce an initial patch with the verbatim Python docstrings (you can of course address the comments that I already made), then we mark the passages that are clearly not valid for _decimal or outdated for _pydecimal, then we go for extra clarity. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue27779> _______________________________________