@ruebot: Hmmm . . . . Apparently, those were load-bearing comments because removing them has caused Travis CI to fail. 

Each report has a message similar to the following near the top:
> Warning: This development build of composer is over 30 days old. It is recommended to update it by running "/home/travis/.phpenv/versions/5.3.3/bin/composer.phar self-update" to get the latest version.

Could that be causing this mysterious failure?