[DOC] Tweak the regexp documentation #12511
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This PR tweaks the regexp documentation. The original text is as follows: > `/[[:blank:]]/`: Matches `/[[:space:]]/` or tab character: Unexpectedly, `[[:blank:]]` doesn't encompass `[[:space:]]`, contrary to the documentation. For example, even a newline character produces different results, as shown below. ```console $ ruby -ve 'p "\n".match?(/[[:space:]]/)' ruby 3.5.0dev (2025-01-05T12:41:53Z master e45fca1) +PRISM [x86_64-darwin23] true $ ruby -ve 'p "\n".match?(/[[:blank:]]/)' ruby 3.5.0dev (2025-01-05T12:41:53Z master e45fca1) +PRISM [x86_64-darwin23] false ``` Actually, `[[:blank:]]` only supports spaces and tab character, excluding No-Break Space (`U+00A0`). - `[[:blank:]]` ... https://github.com/k-takata/Onigmo/blob/Onigmo-6.2.0/enc/unicode/name2ctype.h#L725-L736 - `[[:space:]]` ... https://github.com/k-takata/Onigmo/blob/Onigmo-6.2.0/enc/unicode/name2ctype.h#L2968-L2981 This PR updates the documentation regarding `[[:space:]]` and `[[:blank:]]` in regular expressions.
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This PR tweaks the regexp documentation. The original text is as follows:
Unexpectedly,
[[:blank:]]doesn't encompass[[:space:]], contrary to the documentation. For example, even a newline character produces different results, as shown below.Actually,
[[:blank:]]only supports spaces and tab character, excluding No-Break Space (U+00A0).[[:blank:]]... https://github.com/k-takata/Onigmo/blob/Onigmo-6.2.0/enc/unicode/name2ctype.h#L725-L736[[:space:]]... https://github.com/k-takata/Onigmo/blob/Onigmo-6.2.0/enc/unicode/name2ctype.h#L2968-L2981This PR updates the documentation regarding
[[:space:]]and[[:blank:]]in regular expressions.