bunch more __all__ lists
also modified check_all function to suppress all warnings since they aren't
relevant to what this test is doing (allows quiet checking of regsub, for
instance)
diff --git a/Lib/repr.py b/Lib/repr.py
index 9f7ed86..c2d3ed5 100644
--- a/Lib/repr.py
+++ b/Lib/repr.py
@@ -1,5 +1,7 @@
 """Redo the `...` (representation) but with limits on most sizes."""
 
+__all__ = ["Repr","repr"]
+
 class Repr:
     def __init__(self):
         self.maxlevel = 6