message: Update .gitignore
  Make the rule for what files go in .gitignore more specific -- this is
  the comment at the top of the file.
diff: # ------------------------------------------------------------------------------
  -# List of file patterns we do not want in the repo.
  +# List of file patterns we do not want in the repo that developers are likely
  +# to have in their copy of the repo.
  # ------------------------------------------------------------------------------
  # Object and library files
  