Issue #20326: Argument Clinic now uses a simple, unique signature to

annotate text signatures in docstrings, resulting in fewer false
positives.  "self" parameters are also explicitly marked, allowing
inspect.Signature() to authoritatively detect (and skip) said parameters.

Issue #20326: Argument Clinic now generates separate checksums for the
input and output sections of the block, allowing external tools to verify
that the input has not changed (and thus the output is not out-of-date).

Lib/idlelib/idle_test/test_calltips.py

@@ -54,9 +54,9 @@ class Get_signatureTest(unittest.TestCase):
 
         gtest(List, List.__doc__)
         gtest(list.__new__,
-               'T.__new__(S, ...) -> a new object with type S, a subtype of T')
+               'Create and return a new object.  See help(type) for accurate signature.')
         gtest(list.__init__,
-               'x.__init__(...) initializes x; see help(type(x)) for signature')
+               'Initialize self.  See help(type(self)) for accurate signature.')
         append_doc =  "L.append(object) -> None -- append object to end"
         gtest(list.append, append_doc)
         gtest([].append, append_doc)