commit 01ece63d42b830df106948db0aefa6c1ba24416a
author Lysandros Nikolaou <lisandrosnik@gmail.com> Fri Jun 19 02:10:43 2020 +0300
committer GitHub <noreply@github.com> Fri Jun 19 00:10:43 2020 +0100
tree 0bb2f932d4604c12507dd79b12b06d4dafc46e8b
parent d906f0ec1a5f4ec29a4de74240acf43139886514

bpo-40334: Produce better error messages on invalid targets (GH-20106)

The following error messages get produced:
- `cannot delete ...` for invalid `del` targets
- `... is an illegal 'for' target` for invalid targets in for
  statements
- `... is an illegal 'with' target` for invalid targets in
  with statements

Additionally, a few `cut`s were added in various places before the
invocation of the `invalid_*` rule, in order to speed things
up.

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>