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Docs: Add missing lines between regex and text (GH-134505)

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Rafael Fontenelle 2025-06-19 12:01:29 -03:00 • committed by GitHub
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Doc/howto/regex.rst
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@ -1016,7 +1016,9 @@ extension. This regular expression matches ``foo.bar`` and
Now, consider complicating the problem a bit; what if you want to match Now, consider complicating the problem a bit; what if you want to match
filenames where the extension is not ``bat``? Some incorrect attempts: filenames where the extension is not ``bat``? Some incorrect attempts:
``.*[.][^b].*$`` The first attempt above tries to exclude ``bat`` by requiring ``.*[.][^b].*$``
The first attempt above tries to exclude ``bat`` by requiring
that the first character of the extension is not a ``b``. This is wrong, that the first character of the extension is not a ``b``. This is wrong,
because the pattern also doesn't match ``foo.bar``. because the pattern also doesn't match ``foo.bar``.
@ -1043,7 +1045,9 @@ confusing.
A negative lookahead cuts through all this confusion: A negative lookahead cuts through all this confusion:
``.*[.](?!bat$)[^.]*$`` The negative lookahead means: if the expression ``bat`` ``.*[.](?!bat$)[^.]*$``
The negative lookahead means: if the expression ``bat``
doesn't match at this point, try the rest of the pattern; if ``bat$`` does doesn't match at this point, try the rest of the pattern; if ``bat$`` does
match, the whole pattern will fail. The trailing ``$`` is required to ensure match, the whole pattern will fail. The trailing ``$`` is required to ensure
that something like ``sample.batch``, where the extension only starts with that something like ``sample.batch``, where the extension only starts with