Update title replacement to replace entire element (#734)
Update title replacement to replace entire element (#734)

I misunderstood this code before, thinking it was replacing
the entire element. Without this change, the SITE_TITLE
environment variable will have no effect.
travis-ci/travis-web,travis-ci/travis-web,fotinakis/travis-web,fotinakis/travis-web,travis-ci/travis-web,fotinakis/travis-web,travis-ci/travis-web,fotinakis/travis-web