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bug#34911: 26.1; doc about lock file names

From: Noam Postavsky
Subject: bug#34911: 26.1; doc about lock file names
Date: Sun, 19 May 2019 10:43:52 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux)

Noam Postavsky <address@hidden> writes:

> Drew Adams <address@hidden> writes:
>> The default value is "^\\.?#\\|^\\.$\\|^\\.\\.$".
>> \\.?# matches only the first char of an auto-save file
>> name, and the first two chars of a lock file name.  It
>> does not match the full name, requiring it to end with
>> `#'.  That means that (1) it cannot be used as is for,
>> say, font-locking such a (complete) name, and (2) as
>> it is now, it can falsely identify files that are not
>> auto-save or lock files.
> It's a regexp, so of course you can name files which aren't auto-save or
> lock files in such a way that they match it.

After looking at it some more, I realize you were probably suggesting
that the regexp should have something like "^.#\\|^#.*#$" instead of

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