[issue29338] Output the text signature in the help of a class

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Proposed patch adds a text signature at the start of class description.

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keywords: +patch
stage:  -> patch review
Added file: http://bugs.python.org/file46373/pydoc-class-signature.patch

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<http://bugs.python.org/issue29338>
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