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bug#702: with-help-window returns nil

From: Drew Adams
Subject: bug#702: with-help-window returns nil
Date: Tue, 12 Aug 2008 10:58:39 -0700

> It is not documented that describe-function should return the 
> doc string.

And rightfully so. It does not return the doc string. It returns the content of
*Help*, that is, everything that is there, which includes the doc-string text.
See `describe-function-1' for what is included.

Yes, we could document that it returns the contents of *Help* as a string, but
I'm not sure that would be helpful to most users of `describe-funtion'. Those
who are concerned about the return value will likely look at the source code,
which already includes a comment about it.

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