Fixing broken pull requests due to pw prompt.

More info:
sphinx-contrib/sphinxcontrib-versioning#5

.travis.yml

@@ -11,13 +11,13 @@ after_success:
   - appveyor-artifacts -mi download
   - coverage combine
   - coveralls
-  - touch docs/key; chmod 600 docs/key  # Secure before storing key data.
-  - openssl aes-256-cbc -K $encrypted_84aa143e748f_key -iv $encrypted_84aa143e748f_iv -in docs/key.enc -out docs/key -d
-  - eval `ssh-agent -s`; ssh-add docs/key
+  - eval "$(ssh-agent -s)"; touch docs/key; chmod 0600 docs/key
+  - openssl aes-256-cbc -d -K "$encrypted_84aa143e748f_key" -iv "$encrypted_84aa143e748f_iv" < docs/key.enc > docs/key
+    && ssh-add docs/key
   - git config --global user.email "builds@travis-ci.com"
   - git config --global user.name "Travis CI"
   - git remote set-url origin "git@github.com:$TRAVIS_REPO_SLUG"
-  - export ${!TRAVIS*}  # For commit messages.
+  - export ${!TRAVIS*}
   - tox -e docsV
 
 # Deploy.