[docs] [issue28393] Update encoding lookup docs wrt #27938

[Berker Peksag]

Berker Peksag added the comment:

Thanks for the patch! Do we still need to keep the last sentence? Is there any other alternatives that can be used? Perhaps the word "spellings" can be changed with "aliases" to make the sentence a little bit clearer.

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nosy: +berker.peksag
stage:  -> patch review
type: enhancement -> behavior
versions: +Python 3.6, Python 3.7

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