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

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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>

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Lysandros Nikolaou 2020-06-19 02:10:43 +03:00 • committed by GitHub

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