Do not misdetect %% as position based format string

trans/checks/format.py

@@ -196,7 +196,7 @@ class PythonFormatCheck(BaseFormatCheck):
     regexp = PYTHON_PRINTF_MATCH
 
     def is_position_based(self, string):
-        return '(' not in string
+        return '(' not in string and string != '%'
 
 
 class PHPFormatCheck(BaseFormatCheck):
@@ -210,7 +210,7 @@ class PHPFormatCheck(BaseFormatCheck):
     regexp = PHP_PRINTF_MATCH
 
     def is_position_based(self, string):
-        return '$' not in string
+        return '$' not in string and string != '%'
 
 
 class CFormatCheck(BaseFormatCheck):

trans/tests/format_checks.py

@@ -132,6 +132,15 @@ class PythonFormatCheckTest(TestCase):
             False
         ))
 
+    def test_reordered_named_format_long(self):
+        self.assertFalse(self.check.check_format(
+            u'%(count)d strings into %(languages)d languages %(percent)d%%',
+            u'%(languages)d dil içinde %(count)d satır %%%(percent)d',
+            MockUnit('python_reordered_named_format_long'),
+            0,
+            False
+        ))
+
 
 class PHPFormatCheckTest(TestCase):
     def setUp(self):