[issue31902] Fix col_offset for ast nodes: AsyncFor, AsyncFunctionDef, AsyncWith

[Guo Ci Teo]

Change by Guo Ci Teo <zguoci at gmail.com>:


----------
keywords: +patch
pull_requests: +4143
stage:  -> patch review

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31902>
_______________________________________