Small refactoring of the formatter code.

This should make it slightly more readable as it more clearly separates
what happens where. No intended functional changes. More of this to
come..

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171748 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed