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.

Source/cmWriteFileCommand.cxx

@@ -54,7 +54,7 @@ bool cmWriteFileCommand::InitialPass(std::vector<std::string> const& args,
 #else
                                   mode | S_IWUSR | S_IWGRP
 #endif
-                                  );
+    );
   }
   // If GetPermissions fails, pretend like it is ok. File open will fail if
   // the file is not writable