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Mattias Engdegård authored
Omitting the extra brackets is a common mistake; see discussion at https://lists.gnu.org/archive/html/emacs-devel/2020-02/msg00215.html * src/regex-emacs.c (reg_errcode_t, re_error_msgid): Add REG_ECLASSBR. (regex_compile): Check for the mistake. * test/src/regex-emacs-tests.el (regexp-invalid): Test. * etc/NEWS: Announce.
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