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When compare_tests compares both C and C++ tests in c-c++-common, they get the same identifier, so expected differences in results across languages become undesirably noisy. This patch adds tool identifiers to tests, so that runs by different tools are not confused by the compare logic. It also fixes a bug in reporting differences, that would attempt to print an undefined fname (the definitions are in subshell loops), and adjusts the target insertion to match tabs in addition to blanks after colons. for contrib/ChangeLog * compare_tests: Add tool to test lines. Match tabs besides blanks to insert tool and target. Don't print undefined fname.
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