[gtksourceview] Add warning comment in test-completion.py

[Sébastien Wilmet <swilmet src gnome org>]

commit ac743ffb5383dc874a517f5ae229d82a1812cff7
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Jun 11 13:53:59 2013 +0200

    Add warning comment in test-completion.py
    
    I prefer the C language, that's why I added more tests in
    test-completion.c and not in test-completion.py.

 tests/test-completion.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/test-completion.py b/tests/test-completion.py
index f6b4914..a8dcf5f 100644
--- a/tests/test-completion.py
+++ b/tests/test-completion.py
@@ -1,5 +1,7 @@
 #!/usr/bin/env python
 
+# WARNING: test-completion.c is more complete.
+
 import os, os.path
 import sys