[gobject-introspection] tests: Fix python2/3 difference with respect to rawunicodeescape

[Colin Walters <walters src gnome org>]

commit 67a86420d4ffd394c2834fe3bf0a04f72a00283c
Author: Colin Walters <walters verbum org>
Date:   Tue Sep 29 23:33:00 2015 -0400

    tests: Fix python2/3 difference with respect to rawunicodeescape
    
    Apparently Python 2 still tries to interpret r"\u" in some
    circumstances?

 tests/scanner/test_transformer.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tests/scanner/test_transformer.py b/tests/scanner/test_transformer.py
index e766d61..b45f532 100644
--- a/tests/scanner/test_transformer.py
+++ b/tests/scanner/test_transformer.py
@@ -51,7 +51,7 @@ class TestIdentifierFilter(unittest.TestCase):
               r"-e 's/^test_t$/TestContext/' " \
               r"-e 's/\(.*\)_t$/\1/' " \
               r"-e 's/^test_/Test_/' " \
-              r"-e 's/_\([a-z]\)/\u\1/g'"
+              r"-e 's/_\([a-z]\)/" + '\\u' + r"\1/g'"
 
         namespace = ast.Namespace('Test', '1.0')
         xformer = Transformer(namespace, identifier_filter_cmd=cmd)