[docs] [issue33804] Document the default value of the size parameter of io.TextIOBase.read

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:


New changeset ad0fc8ddba0e2f6715dc14c74cb4dbd437b3777d by Serhiy Storchaka (Andrés Delfino) in branch '2.7':
[2.7] bpo-33804: Document that the argument for io.TextIOBase.read() is optional (GH-7510). (GH-8171)
https://github.com/python/cpython/commit/ad0fc8ddba0e2f6715dc14c74cb4dbd437b3777d


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