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/cmExtraKateGenerator.cxx

@@ -199,8 +199,9 @@ void cmExtraKateGenerator::AppendTarget(cmGeneratedFileStream& fout,
 {
   static char JsonSep = ' ';
 
-  fout << "\t\t\t" << JsonSep << "{\"name\":\"" << target << "\", "
-                                                             "\"build_cmd\":\""
+  fout << "\t\t\t" << JsonSep << "{\"name\":\"" << target
+       << "\", "
+          "\"build_cmd\":\""
        << make << " -C \\\"" << (this->UseNinja ? homeOutputDir : path)
        << "\\\" " << makeArgs << " " << target << "\"}\n";