[llvm-pdbdump] clang-format Diff.cpp

Looks like this file did not have clang-format run on
it when its initial revision was committed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297977 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed