Fix invalid escape

Author: tomasr8

Lib/test/test_gettext.py

@@ -38,7 +38,7 @@
 '''
 
 # Invalid magic number ('ABCD' b64-encoded)
-GNU_MO_DATA_BAD_MAGIC_NUMBER = b'\QUJDRA=='
+GNU_MO_DATA_BAD_MAGIC_NUMBER = rb'\QUJDRA=='
 
 # This data contains an invalid major version number (5)
 # An unexpected major version number should be treated as an error when