formatting help messages

lib/build.sh

@@ -3,12 +3,13 @@ build_failed() {
   head "Build failed"
   echo ""
   info "We're sorry this build is failing!"
+  info ""
   info "Are you running into a common issue?"
   info "https://devcenter.heroku.com/articles/troubleshooting-node-deploys"
   info ""
   if [ "$warn" != "" ]; then
     info "During the build we spotted some likely problems:"
-    echo $warn | indent
+    echo "$warn" | indent
   else
     info "If you're stuck, please submit a ticket so we can help:"
     info "https://help.heroku.com/"