Minor typo in help text.

modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/Codegen.java

@@ -44,7 +44,7 @@ public static void main(String[] args) {
     options.addOption("i", "input-spec", true, "location of the swagger spec, as URL or file");
     options.addOption("t", "template-dir", true, "folder containing the template files");
     options.addOption("d", "debug-info", false, "prints additional info for debugging");
-    options.addOption("a", "auth", true, "addes authorization headers when fetching the swagger definitions remotely. Pass in a URL-encoded string of name:header with a comma separating multiple values");
+    options.addOption("a", "auth", true, "adds authorization headers when fetching the swagger definitions remotely. Pass in a URL-encoded string of name:header with a comma separating multiple values");
 
     ClientOptInput clientOptInput = new ClientOptInput();
     ClientOpts clientOpts = new ClientOpts();