Clean up some whitespace and comment formatting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190015 91177308-0d34-0410-b5e6-96231b3b80d8
Formatting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190019 91177308-0d34-0410-b5e6-96231b3b80d8
Fix comments to reflect reality.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190021 91177308-0d34-0410-b5e6-96231b3b80d8