[issue8260] When I use codecs.open(...) and f.readline() follow up by f.read() return bad result

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Here is revised patch.

* Behavior is changed less. read() is less greedy and uses characters from the buffer when read() is called with only one argument (size). It is now a little closer to io stream's read() than with previous patch.

* Added tests for cases of issue12446 and issue16636.

* Fixed read() for for the TransformCodecTest.test_read test added in 3.4. Actually the uu_codec and zlib_codec are broken.

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versions:  -Python 3.2
Added file: http://bugs.python.org/file33410/codecs_read-3.patch

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<http://bugs.python.org/issue8260>
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