docs(lib): fix syntax error docs generation command

Author: seanmonstar

.travis.yml

@@ -37,10 +37,10 @@ after_success: |
     ls target/debug &&
     ./kcov-master/tmp/usr/local/bin/kcov --coveralls-id=$TRAVIS_JOB_ID --exclude-pattern=/.cargo target/kcov target/debug/hyper-* &&
     [ $TRAVIS_PULL_REQUEST = false ] &&
-    [ "$TRAVIS_TAG" != "" || $TRAVIS_BRANCH = master ] &&
-    [ $TRAVIS_RUST_VERSION = stable ] &&
+    { [ "$TRAVIS_TAG" != "" ] || [ "$TRAVIS_BRANCH" == "master" ]; } &&
     cargo doc --no-deps &&
-    ./.travis/docs.sh
+    ./.travis/docs.sh &&
+    echo "\nDocs published.\n"
 
 env:
     global: