Adjust idlelib tiptest

from Lib/idlelib/idle_test/test_calltip.py:
The tests of builtins may break if inspect or the docstrings change,
but a red buildbot is better than a user crash (as has happened).
For a simple mismatch, change the expected output to the actual.

Lib/idlelib/idle_test/test_calltip.py

@@ -88,10 +88,7 @@ class SB:  __call__ = None
 replacement repl.  repl can be either a string or a callable;
 if a string, backslash escapes in it are processed.  If it is
 a callable, it's passed the Match object and must return''')
-        tiptest(p.sub, '''\
-(repl, string, count=0)
-Return the string obtained by replacing the leftmost \
-non-overlapping occurrences o...''')
+        tiptest(p.sub, '(repl, string, count=0)')
 
     def test_signature_wrap(self):
         if textwrap.TextWrapper.__doc__ is not None: