Fix coding style in docs/function.md

docs/function.md

@@ -955,7 +955,7 @@ foo(2, 4, 6, 8)
 (function() {
   return [
     (() => this.x).bind({ x: 'inner' })()
-  ]
+  ];
 }).call({ x: 'outer' });
 // ['outer']
 ```
@@ -1363,7 +1363,7 @@ function tco(f) {
       active = false;
       return value;
     }
-  }
+  };
 }
 
 var sum = tco(function(x, y) {