Typo in comment, and optional semicolon in JS

Tom

2014-11-13 b95f47005679e25e2da67e0747edfec81d973cfe

 src/main/java/com/gitblit/wicket/pages/scripts/imgdiff.js

@@ -19,5 +19,5 @@
      var w = 1.0 - (this.scrollLeft / (this.scrollWidth - (this.clientWidth || this.offsetWidth)));
      // We encode the target img id in the slider's id: slider-imgdiffNNN.
      jQuery('#' + this.id.substr(this.id.indexOf('-') + 1)).css("opacity", w);
   })
   });
});