[pull] main from python:main#1195
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Implement set difference [A--B], intersection [A&&B] and union [A||B] in regular expression character classes (Unicode Technical Standard #18), including nested, complemented and compound set operands. Symmetric difference [A~~B] remains reserved. Also use the new syntax in the standard library (_strptime, textwrap, doctest, pkgutil). Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
…-152154) Move the compile-time optimizations (_optimize_charset, _compile_charset, _simple, _compile_info and the literal/charset prefix helpers) out of _compiler.py into a new Lib/re/_optimizer.py. _compiler.py keeps only the bytecode emitter and imports them. This is groundwork for a follow-up optimization; there is no behavior change. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
…z offset (#152087) Co-authored-by: Stan Ulbrych <stan@python.org>
Co-authored-by: sobolevn <mail@sobolevn.me>
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