Bug 1209470 - Remove use of expression closure from Add-on SDK. r=mossop

addon-sdk/source/python-lib/plural-rules-generator.py

@@ -152,8 +152,12 @@ print """/* This Source Code Form is subject to the terms of the Mozilla Public
 const LOCALES_TO_RULES = %s;
 
 // Utility functions for plural rules methods
-function isIn(n, list) list.indexOf(n) !== -1;
-function isBetween(n, start, end) start <= n && n <= end;
+function isIn(n, list) {
+  return list.indexOf(n) !== -1;
+}
+function isBetween(n, start, end) {
+  return start <= n && n <= end;
+}
 
 // List of all plural rules methods, that maps an integer to the plural form name to use
 const RULES = {