Fix regression in formatting pointer types.

We will need a more principled solution, but we should not leave this
unfixed until we come up with one.

Before: void f() { int * a; }
After:  void f() { int *a; }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173252 91177308-0d34-0410-b5e6-96231b3b80d8