[issue19903] Idle: Use inspect.signature for calltips

[Terry J. Reedy]

Terry J. Reedy added the comment:

My understanding is that when a builtin is converted, a) the docstring signature disappears, and b) getfullargspec calls str(signature). I need to check what now happens with .getfullargspec version .signature for uncoverted builtins and if any changes should be made now.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19903>
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