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Emacs comments and doc were inconsistent about the name used for regexps like [a-z]. Sometimes it called them “character alternatives”, sometimes “character sets”, sometimes “bracket expressions”. Prefer “bracket expressions” as it is less confusing: POSIX and most other programs’ doc uses “bracket expressions”, “alternative” is also used in the Emacs documentation to talk about ...\|... in regexps, and “character set” normally has a different meaning in Emacs. |
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