[issue25198] Idle: improve idle.html help viewer.

[Terry J. Reedy]

Terry J. Reedy added the comment:

Had to adjust number of line by 3/4 because average 4/3 as high as in editor due to taller header lines and extra interline spacing.  Net result for me, using 12 pitch in editor also, is box size within 5%.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25198>
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