Merge pull request #20 from trofim24/patch-2

Fix extraCommandArgs not being copied

Author: Dominator008

lib/node/closure-compiler.js

@@ -34,7 +34,7 @@ var contribPath = path.dirname(compilerPath) + '/contrib';
  * @param {Array<String>=} extraCommandArgs
  */
 function Compiler(args, extraCommandArgs) {
-  this.commandArguments = extraCommandArgs || [];
+  this.commandArguments = (extraCommandArgs || []).slice();
 
   this.commandArguments.push('-jar', Compiler.JAR_PATH);