Give people who run "pydoc re" a clue.
diff --git a/Lib/re.py b/Lib/re.py
index b91aec7..f1cbe2c 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -1,4 +1,4 @@
-"""Minimal "re" compatibility wrapper"""
+"""Minimal "re" compatibility wrapper.  See "sre" for documentation."""
 
 engine = "sre" # Some apps might use this undocumented variable