Merge pull request #1498 from ebuildy/patch-1

Remove wrong bracket from code snippet

Author: contra

docs/writing-a-plugin/README.md

@@ -107,7 +107,7 @@ module.exports = function() {
     this.push(files[0]);
     this.push(files[1]);                              
     callback();
-  }); 
+  }; 
 
   return through.obj(transform);
 };