[issue13815] tarfile.ExFileObject can't be wrapped using io.TextIOWrapper

[Terry J. Reedy]

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

Based on other examples in the doc, I think the note
"... and also supports iteration over its lines."
should be extended with 
" It also has a dummy `flush` method, so that it can be wrapped using :class:`io.TextIOWrapper`."

Then just add
".. versionchanged:: 3.3
      Added the `flush` method."

I leave the test to Lars.

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nosy: +terry.reedy
stage:  -> patch review
type:  -> enhancement

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