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Help: Clarify documentation on regex character classes

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In particular, give an example of matching `]`.
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Martin Stadler 2024-04-11 05:16:32 -04:00 committed by Brad King
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Help/command/string.rst
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@ -136,15 +136,16 @@ The following characters have special meaning in regular expressions:
or ``\\`` for a literal backslash ``\``. Escaping a non-special or ``\\`` for a literal backslash ``\``. Escaping a non-special
character is unnecessary but allowed, e.g. ``\a`` matches ``a``. character is unnecessary but allowed, e.g. ``\a`` matches ``a``.
``[ ]`` ``[ ]``
Matches any character(s) inside the brackets Matches any character(s) inside the brackets.
To match a literal ``]``, make it the first character, e.g., ``[]ab]``.
``[^ ]`` ``[^ ]``
Matches any character(s) not inside the brackets Matches any character(s) not inside the brackets.
To not match a literal ``]``, make it the first character, e.g., ``[^]ab]``.
``-`` ``-``
Inside brackets, specifies an inclusive range between Inside brackets, specifies an inclusive range between characters on
characters on either side e.g. ``[a-f]`` is ``[abcdef]`` either side, e.g., ``[a-f]`` is ``[abcdef]``.
To match a literal ``-`` using brackets, make it the first To match a literal ``-`` using brackets, make it the first or the last
or the last character e.g. ``[+*/-]`` matches basic character, e.g., ``[+*/-]`` matches basic mathematical operators.
mathematical operators.
``*`` ``*``
Matches preceding pattern zero or more times Matches preceding pattern zero or more times
``+`` ``+``