Measurer.measure wrote each blob's decoded text into the temp tree with write_text's
default newline translation. On Windows that turns a CRLF blob into CR CR LF, so ruff
counted lines differently from the AST and comment tables: hits moved to <module>,
their `# health: allow` waivers were missed, and valid code blocked. Writing with
newline="" keeps the blob's own line endings. The test forces the Windows write
translation so it also runs on Linux.
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