bug#44188: [PATCH] Use lexical binding in wdired.el

[Lars Ingebrigtsen]

Brian Leung <leungbk@mailfence.com> writes:

> I enforced lexical binding in a few other files.

Thanks, but I'm slightly worried whether these have been tested?
There's sometimes subtle problems with converting to lexical binding
that's not obvious from just compiling the files, but is only revealed
by actually using the functions.

So when converting to lexical binding, we try to (where it makes sense)
to add some unit tests to test/lisp/<file>-tests.el at the same time to
give us greater confidence that the mechanisms still work.

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