fix style (vuejs#5383)

Author: romoo

benchmarks/big-table/demo.css

@@ -1,5 +1,5 @@
 form {
-  margin-bottom: 15px ;
+  margin-bottom: 15px;
 }
 
 td.hidden {

benchmarks/big-table/index.html

@@ -71,12 +71,12 @@ <h1>Rendering Dynamic Big Table</h1>
       var valueIndex = 0
       var grid = []
 
-      for ( var r = 0 ; r < rowCount ; r++ ) {
+      for ( var r = 0; r < rowCount; r++ ) {
         var row = {
           id: r,
           items: []
         }
-        for ( var c = 0 ; c < columnCount ; c++ ) {
+        for ( var c = 0; c < columnCount; c++ ) {
           row.items.push({
             id: ( r + "-" + c ),
             value: valuePoints[ valueIndex ]