fix(parser): correct pure percent addition and preserve relative perc…#3573

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philpeng1 wants to merge 3 commits intojosdejong:developfrom

philpeng1:fix/percent-additions

Commits on Nov 24, 2025

fix(parser): correct pure percent addition and preserve relative percent semantics; add tests
philpeng1
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parser: prefer unary percent after pure percent LHS; keep modulo symmetry; update grouping/ambiguous tests
philpeng1
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chore:format to LF line endings
philpeng1
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