Replace trivial pcase occurrences in the Emacs sources (was: The poor state of documentation of pcase like things.)

[Michael Heerdegen]

Hello,

>   [pcase] - Occurrences in the sources must be revised.

Some time (two years) ago I volunteered to replace lots of the `pcase'
occurrences in the Emacs sources (back) to cl-case where possible.  Lots
of people wanted this because they found understanding pcase expressions
hard.

I would like to do that now.  Stefan, can you live with that (AFAIR you
didn't participate in the discussion at that time)?

Or has the mood of people changed in the meantime due to the improved
documentation of `pcase'?

In a second step, I also would want to replace the unnecessarily
backquoted patterns to use quotes, i.e. `DOESNT-UNQUOTE ->
'DOESNT-UNQUOTE (the `ATOM patterns go back to a time where the quoted
syntax wasn't yet implemented).

A question: when I compose the commit message, I can write something
like "Change all affected callers in all files" instead of listing all
individual changed functions separately, right?


Thanks,

Michael.