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bug#10033: 24.0.91; Uncommenting fails in Autoconf mode
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From: |
Chong Yidong |
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Subject: |
bug#10033: 24.0.91; Uncommenting fails in Autoconf mode |
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Date: |
Sun, 13 Nov 2011 10:39:32 +0800 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.91 (gnu/linux) |
Chong Yidong <cyd@gnu.org> writes:
> With latest trunk:
>
> emacs -Q configure.ac
> M-;
> asdf
> C-SPC M-<
> M-x uncomment-region RET
>
> The uncomment-region does nothing; the line containing "dnl asdf"
> remains commented out.
This is because the value of comment-start-skip in Autoconf mode is
"\\(?:\\<dnl\\|#\\) +"
The \< is intended to avoid matching a "dnl" that is part of a word. In
Emacs 23, the \< matches the beginning of the line
dnl asdf
in Autoconf mode. But in Emacs 24, it does not match the beginning of
that line at all. I don't see any related regexp changes in NEWS. Does
it ring a bell for anyone?