message: Update clang-format.py to include only known-good versions
  3.6.2 on Yakkety did not produce compatible outputs
  the rest of 3.6.x were not verified, but are not needed since Travis is using 3.8.0
  3.8.1 was added as it produced compatible results with 3.8.1 (at least the indicated version)
diff: @@ -17,7 +17,10 @@ import StringIO
  import pdb
  import tempfile
  -tested_versions = ['3.6.0', '3.6.1', '3.6.2', '3.8.0'] # A set of versions known to produce the same output
  +# A set of versions known to produce the same output
  +tested_versions = ['3.8.0',
  + '3.8.1', # 3.8.1-12ubuntu1 on yakkety works
  + ]
  accepted_file_extensions = ('.h', '.cpp') # Files to format
  trailing_comment_exe = "trailing-comment.py"
  max_col_len = 120
  