[clang-tidy] Simplify RUN: lines in the test

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@220632 91177308-0d34-0410-b5e6-96231b3b80d8
[clang-tidy] Clean up test.

Simplify RUN lines and make checks stricter, check messages instead of fixes.


git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@220633 91177308-0d34-0410-b5e6-96231b3b80d8