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Title: bpo-27240 Rewrite the email header folding algorithm. by bitdancer · Pull Request #3488 · python/cpython · GitHub

Open Graph Title: bpo-27240 Rewrite the email header folding algorithm. by bitdancer · Pull Request #3488 · python/cpython

X Title: bpo-27240 Rewrite the email header folding algorithm. by bitdancer · Pull Request #3488 · python/cpython

Description: This will also fix bpo-30788. The original algorithm tried to delegate the folding to the tokens so that those tokens whose folding rules differed could specify the differences. However, this resulted in a lot of duplicated code because most of the rules were the same. The new algorithm moves all folding logic into a set of functions external to the token classes, but puts the information about which tokens can be folded in which ways on the tokens...with the exception of mime-parameters, which are a special case (which was not even implemented in the old folder). This algorithm can still probably be improved and hopefully simplified somewhat. Note that some of the test expectations are changed. I believe the changes are toward more desirable and consistent behavior: in general when (re) folding a line the canonical version of the tokens is generated, rather than preserving errors or extra whitespace. https://bugs.python.org/issue27240

Open Graph Description: This will also fix bpo-30788. The original algorithm tried to delegate the folding to the tokens so that those tokens whose folding rules differed could specify the differences. However, this resu...

X Description: This will also fix bpo-30788. The original algorithm tried to delegate the folding to the tokens so that those tokens whose folding rules differed could specify the differences. However, this resu...

Opengraph URL: https://github.com/python/cpython/pull/3488

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bpo-27240 Rewrite the email header folding algorithm. https://github.com/python/cpython/pull/3488/commits/e36dc10aec1990c06731e3933d6234e03aa2049f#top
Show all changes 3 commits https://github.com/python/cpython/pull/3488/files
0323fe2 Rewrite the header folding algorithm. bitdancer Sep 7, 2017 https://github.com/python/cpython/pull/3488/commits/0323fe21b8f69c477ac5492dfa3a989795b36df1
e36dc10 Add NEWS item. bitdancer Dec 3, 2017 https://github.com/python/cpython/pull/3488/commits/e36dc10aec1990c06731e3933d6234e03aa2049f
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