Exclude tests from formatting as they are auto-generated and include html

Summary: Don't want to autoformat tests as they are autogenerated. Also they contain html which we don't want to get limited by line length.

Reviewed By: lucasr

Differential Revision: D3785246

fbshipit-source-id: 3e07b300ad16a1f0de53840e399eea25f4672b58

format.sh

@@ -28,7 +28,6 @@ clang-format \
     UseTab: Never, \
   }" "$@" \
   -i $(dirname $0)/CSSLayout/*.{h,c,cpp} \
-     $(dirname $0)/tests/*.{h,c,cpp} \
      $(dirname $0)/tests/CSSLayoutTestUtils/*.{h,c,cpp} \
      $(dirname $0)/benchmarks/*.{h,c,cpp} \
      $(dirname $0)/java/jni/*.{h,c,cpp}