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/regsub.py b/Lib/regsub.py
index de833d5..a86819f 100644
--- a/Lib/regsub.py
+++ b/Lib/regsub.py
@@ -19,6 +19,7 @@
 
 import regex
 
+__all__ = ["sub","gsub","split","splitx","capwords"]
 
 # Replace first occurrence of pattern pat in string str by replacement
 # repl.  If the pattern isn't found, the string is returned unchanged.