Test pre-commit hook for a link to a .py file.

diff --git a/Lib/a.py b/Lib/a.py
new file mode 120000 (symlink)
index 0000000..4cb9953
--- /dev/null
+++ b/Lib/a.py
@@ -0,0 +1 @@
+urllib.py
\ No newline at end of file