make travis fail when javadoc doesn't compile

.travis.yml

@@ -9,6 +9,7 @@ install:
 - travis_retry docker build -t cabaletta/baritone .
 
 script:
+- docker run cabaletta/baritone ./gradlew javadoc
 - docker run --name baritone cabaletta/baritone /bin/sh -c "set -e; /sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -screen 0 128x128x24 -ac +extension GLX +render; DISPLAY=:99 BARITONE_AUTO_TEST=true ./gradlew runClient"
 - docker cp baritone:/code/dist dist
 - ls dist

src/main/java/baritone/utils/ToolSet.java

@@ -137,7 +137,7 @@ public class ToolSet {
      *
      * @param item  the item to mine it with
      * @param state the blockstate to be mined
-     * @return how long it would take in ticks
+     * @rturn how long it would take in ticks
      */
     public static double calculateSpeedVsBlock(ItemStack item, IBlockState state) {
         float hardness = state.getBlockHardness(null, null);