test(coverage): the two-declaration floor check compares two multi-line rules — formatting is part of the fingerprint, as before (#2903)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_pattern_coverage.py

@@ -493,7 +493,7 @@ def test_extract_definitions_fingerprints_each_block():
     import hashlib
     assert e["a"].body_sha != e["b"].body_sha != e["c"].body_sha
     assert e["a"].body_sha != hashlib.sha1(b"").hexdigest()[:16]
-    two = ".a { color: red; margin: 0; }\n.b {\n  color: red;\n  margin: 0;\n}\n"
+    two = ".a {\n  color: red;\n  margin: 0;\n}\n.b {\n  color: red;\n  margin: 0;\n}\n"
     f = {x.name: x for x in extract_definitions(two)}
     assert f["a"].body_sha == f["b"].body_sha