[docs] [issue28763] Use en-dashes for ranges in docs

[Mark Dickinson]

Mark Dickinson added the comment:

> Did you mean en-dash rather than em-dash?

Ah, judging by the title and the patch, you did. :-) Phew!

Now I can delete the long post I had citing multiple sources for using en-dashes (not em-dashes) for numeric ranges...

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28763>
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