Fix formatting. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222545 91177308-0d34-0410-b5e6-96231b3b80d8
Less space; NFC


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222546 91177308-0d34-0410-b5e6-96231b3b80d8
Allow multiple -debug-only args

Debug output is shown if any of the -debug-only arguments match.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222547 91177308-0d34-0410-b5e6-96231b3b80d8