fix $TRAVIS_TAG check for latest/ symlink

Author: nfriedly

jsdoc/publish.sh

@@ -21,7 +21,7 @@ if [ "$TRAVIS_REPO_SLUG" == "watson-developer-cloud/node-sdk" ] && [ "$TRAVIS_PU
 
     # update the latest/ symlink
     # on tagged builds, $TRAVIS_TAG is set to the tag, but it's blank on regular builds, unlike $TRAVIS_BRANCH
-    if ["$TRAVIS_TAG" != ""]; then
+    if [ $TRAVIS_TAG ]; then
       rm latest
       ln -s $TRAVIS_TAG latest
     fi