bug#34911: 26.1; doc about lock file names

[Noam Postavsky <npostavs@gmail.com>]

Drew Adams <drew.adams@oracle.com> 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
>> "^\\.?#"
>
> No, I don't think so.  It is correct, I think, to
> say that the beginning matches .# (or the whole
> thing matches . or ..) - that is, the dot is literal.

Sorry, forgot to escape the dot, I meant

    "^\\.#\\|^#.*#$" instead of "^\\.?#"