Revise C++ coding style using clang-format-6.0

Run the `clang-format.bash` script to update all our C and C++ code to a
new style defined by `.clang-format`.  Use `clang-format` version 6.0.

* If you reached this commit for a line in `git blame`, re-run the blame
  operation starting at the parent of this commit to see older history
  for the content.

* See the parent commit for instructions to rebase a change across this
  style transition commit.

1 files changed, 1 insertions, 0 deletions

diff --git a/Tests/CompileFeatures/cxx_contextual_conversions.cpp b/Tests/CompileFeatures/cxx_contextual_conversions.cpp
index cbc7304..247f13f 100644
--- a/Tests/CompileFeatures/cxx_contextual_conversions.cpp
+++ b/Tests/CompileFeatures/cxx_contextual_conversions.cpp
@@ -17,6 +17,7 @@ public:
   }
   operator T&() { return val; }
   operator T() const { return val; }
+
 private:
   T val;
 };