tor/changes/lcov_excl

  o Minor features (testing):
    - Use the lcov convention for marking lines as unreachable, so that
      we don't count them when we're generating test coverage data.
      Update our coverage tools to understand this convention.
      Closes ticket #16792.
Adopt the LCOV convention for marking lines as unreachable by tests. Document this convention. Add a script to post-process .gcov files in order to stop nagging us about excluded lines. Teach cov-diff to handle these post-processed files. Closes ticket 16792 2016-04-12 21:12:10 -04:00			`o Minor features (testing):`
			`- Use the lcov convention for marking lines as unreachable, so that`
			`we don't count them when we're generating test coverage data.`
			`Update our coverage tools to understand this convention.`
			`Closes ticket #16792.`