Add a .clang-format to avoid reflow of test RUN lines

See thread "clang-format turning tests into no-ops"

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@196037 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a variety of user-visible and comment typos

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@196038 91177308-0d34-0410-b5e6-96231b3b80d8