message: Unlink python@2 so gnuplot install works
diff: @@ -10,6 +10,7 @@ if [ "$DOCS" = "yes" ]; then
  fi
  if [ "$TRAVIS_OS_NAME" = "osx" ] && [ "$GNUPLOT" = "yes" ]; then
  + brew unlink python@2 # because we're installing python3 and they both want to install stuff under /usr/local/Frameworks/Python.framework/
  brew install gnuplot
  fi
  