Discovering correct syntax by process of elimination

Author: edunham

.travis.yml

@@ -8,7 +8,7 @@ sudo: false
 # Cloudfront invalidation: If not PR, decrypt credentials, then run 
 # https://github.com/laurilehmijoki/cf-s3-invalidator if build succeeded
 before_install:
-- '[[ $TRAVIS_PULL_REQUEST == "false" ]] && openssl aes-256-cbc -K $encrypted_9a099440e1ee_key -iv $encrypted_9a099440e1ee_iv -in _cf_s3_invalidator.yml.enc -out _cf_s3_invalidator.yml -d'
+- '[ "${TRAVIS_PULL_REQUEST}" = "false" ] && openssl aes-256-cbc -K $encrypted_9a099440e1ee_key -iv $encrypted_9a099440e1ee_iv -in _cf_s3_invalidator.yml.enc -out _cf_s3_invalidator.yml -d'
 install: 
 - gem install cf-s3-invalidator
 - gem install jekyll