[issue25564] Document that IDLE -python difference for `del __builtins__`

[Terry J. Reedy]

Terry J. Reedy added the comment:

I added what I think is an improved version of what I posted.

For 2.7 only, a change in the generated html outside of the text proper from using — and » to using — and &#187' resulted in the extraneous characters being shown.  The displayed text was preceded by '—»»»» ' and followed by the closers.  Adding the missing guard 'if self.show' to the charref function prevents this.

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resolution:  -> fixed
stage: needs patch -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue25564>
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