tests: mkenums: placate flake8
diff --git a/gobject/tests/mkenums.py b/gobject/tests/mkenums.py
index 6a971c3..dbc06aa 100644
--- a/gobject/tests/mkenums.py
+++ b/gobject/tests/mkenums.py
@@ -342,8 +342,8 @@
 
         with tempfile.NamedTemporaryFile(dir=self.tmpdir.name,
                                          suffix='1.h') as h_file1, \
-             tempfile.NamedTemporaryFile(dir=self.tmpdir.name,
-                                         suffix='2.h') as h_file2:
+                tempfile.NamedTemporaryFile(dir=self.tmpdir.name,
+                                            suffix='2.h') as h_file2:
             # Write out the headers.
             h_file1.write(h_contents1.encode('utf-8'))
             h_file2.write(h_contents2.encode('utf-8'))