[docs] [issue13632] Update token documentation to reflect actual token types

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Looks good to me.
help(token) already has the corrections. - BACKQUOTE, + RARROW, ELLIPSIS

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nosy: +terry.reedy

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<http://bugs.python.org/issue13632>
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