xiaweiwei67-stack a94f4e3c18 fix(edit): keep untouched lines intact on fuzzy match ...

The Edit tool falls back to a whitespace-tolerant fuzzy match when oldText does not match byte-for-byte. On a fuzzy hit it replaced text inside a whitespace-normalized copy of the whole file and wrote that copy back, so every untouched line lost its original indentation (runs of spaces/tabs collapsed to a single space). For indentation-sensitive files such as Python this silently corrupts the file.

Locate the fuzzy match in the original content with a whitespace-flexible regex and return offsets into that original content, so only the matched region is replaced. Adds regression tests.

Co-authored-by: Cursor <cursoragent@cursor.com>

2026-07-07 16:50:16 +08:00

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