doc formatting errs
Squashed 'maint-travis-ci/' content from commit 75aad7e

git-subtree-dir: maint-travis-ci
git-subtree-split: 75aad7e8ef3a8deab32cde7c352ccaf3781dae63
Merge commit '5ef575b01599cee21353eb2dc7a716959eeaefd7' as 'maint-travis-ci'
Enable travis