[NaCl SDK] easy_template: fix bug when using % in an expression template.

native_client_sdk/src/build_tools/tests/easy_template_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import cStringIO
 import difflib
 import os
 import sys
 import unittest
@@ skipping 91 matching lines @@
 struct Foo {
   std::string name;
   int problems[99];
 };"""
     self._RunTest(template, expected, {
       'name': 'Foo',
       'fields': [
         {'name': 'name', 'type': 'std::string'},
         {'name': 'problems', 'type': 'array', 'basetype': 'int', 'size': 99}]})
 
+  def testModulo(self):
+    self._RunTest('No expression %', 'No expression %', {})
+    self._RunTest('% before {{3 + 4}}', '% before 7', {})
+    self._RunTest('{{2**8}} % after', '256 % after', {})
+    self._RunTest('inside {{8 % 3}}', 'inside 2', {})
+    self._RunTest('Everywhere % {{8 % 3}} %', 'Everywhere % 2 %', {})
+
 
 if __name__ == '__main__':
   unittest.main()