clang-format: Fix corner case in pointer/reference detection.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211487 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: [proto] Add required space before absolute references.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211488 91177308-0d34-0410-b5e6-96231b3b80d8