[6.0] Fix word boundary matching in matches(of:)
#746
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A prior change incorrectly treated the start of the `searchBounds` as an always-valid word boundary, which resulted in a word boundary at the start of a pattern unconditionally matching at the restart point when finding all matches in a string. This change corrects the usage to recognize word boundaries only at the start of the `subjectBounds`. rdar://129417643
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stephentyrone
approved these changes
Jun 10, 2024
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\bmatches at every position in amatches(of:)search when used at the beginning of a pattern.matches(of:)#744Cherry pick of #744 to the
swift/release/6.0branch.