Add colors.

+ example.

.clang-format

@@ -1,8 +1,4 @@
 # Defines the Chromium style for automatic reformatting.
 # http://clang.llvm.org/docs/ClangFormatStyleOptions.html
 BasedOnStyle: Chromium
-# This defaults to 'Auto'. Explicitly set it for a while, so that
-# 'vector<vector<int> >' in existing files gets formatted to
-# 'vector<vector<int>>'. ('Auto' means that clang-format will only use
-# 'int>>' if the file already contains at least one such instance.)
 Standard: Cpp11