message: Check *.cpp files (not *.cxx), remove stray space
diff: #!/bin/bash
  -DIFF=`git diff -U0 $1...$2 -- '*.h' '*.cxx' | clang-format-diff-3.8 -p1`
  +DIFF=`git diff -U0 $1...$2 -- '*.h' '*.cpp' | clang-format-diff-3.8 -p1`
  if [ -z "$DIFF" ]; then
  exit 0
  else
  