cpputest / cpputest / 30531233701

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fix: bound CheckEqualFailure difference scans

CHECK_EQUAL can receive unequal values whose formatted representations are identical. Bound both difference-location scans by the shorter string so failure reporting stops at the end instead of reading past the buffers.

Constraint: Preserve existing difference positions for genuinely different strings
Confidence: high
Scope-risk: narrow
Tested: Linux GCC 14 ASan regression reproduces before and passes after
Tested: CppUTest and CppUTestExt CTest suite, 79/79 passed

8 of 8 new or added lines in 1 file covered. (100.0%)

6771 of 6820 relevant lines covered (99.28%)

46720.96 hits per line