bug#42207: 28.0.50; (where-is-internal) reports incorrect binding

[Dima Kogan <dima@secretsauce.net>]

Hi. I'm using a pretty recent emacs built from git, although I don't
think this bug is a recent regression. From a user perspective, the
issue looks like this:

1. emacs -Q
2. Open any .py file, or just M-x python mode
3. M-x forward-se [TAB]

Step 3 asks emacs to complete. There're two matches: forward-sexp and
forward-sentence. Emacs also helpfully reports the associated bindings
with each command because suggest-key-bindings is not nil. It says
that the binding for forward-sentence is M-e, which is NOT the case
here: M-e is python-nav-forward-block.

Digging a bit, I see that the issue is that we call (where-is-internal)
in simple.el, and this is the issue:

  (key-description (where-is-internal 'forward-sentence nil t))

returns

  "M-e", even in python-mode

This maybe is related to the way this keymap is defined. python-mode-map is

  (keymap
   .... keys keys keys ...
   (remap keymap
          (mark-defun . python-mark-defun)
          (backward-up-list . python-nav-backward-up-list)
          (forward-sentence . python-nav-forward-block)
          (backward-sentence . python-nav-backward-block))
   ...
  )

I haven't read about this remap thing yet, and the docstring for
(where-is-internal) does have a NO-REMAP option, but "M-e" is reported
regardless of the value of NO-REMAP.

Thanks.





Configured using:
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Configured features:
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LCMS2 GMP

Important settings:
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  value of $LANG: C
  locale-coding-system: nil