Replace leading whitespace in commit message.
Replace leading whitespace in commit message.

This allows for proper indentation to display ASCII art.

Fixes travis-ci/travis-ci#2003

fauxton/travis-web,travis-ci/travis-web,2947721120/travis-web,fauxton/travis-web,mjlambert/travis-web,jlrigau/travis-web,2947721120/travis-web,fotinakis/travis-web,Tiger66639/travis-web,2947721120/travis-web,jlrigau/travis-web,fotinakis/travis-web,travis-ci/travis-web,travis-ci/travis-web,jlrigau/travis-web,mjlambert/travis-web,Tiger66639/travis-web,travis-ci/travis-web,Tiger66639/travis-web,Tiger66639/travis-web,jlrigau/travis-web,fotinakis/travis-web,fotinakis/travis-web,fauxton/travis-web,mjlambert/travis-web,mjlambert/travis-web,fauxton/travis-web,2947721120/travis-web