D3210: patch: move yielding "\n" to the end of loop

[yuja (Yuya Nishihara)]

yuja added a comment.


  Perhaps, it's simpler to use `mdiff.splitnewlines(chunk)` instead of `chunk.split('\n')`
  because otherwise the next patch has to reconstruct `line + '\n'`.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3210

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Cc: yuja, mercurial-devel