Correctly format dereference and address of in array parameters.

Before: InvalidRegions[ &R] = 0;
After:  InvalidRegions[&R] = 0;

This fixes llvm.org/PR14793

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171522 91177308-0d34-0410-b5e6-96231b3b80d8