This patch adds support for py3k in diffhelpers.c. This is accomplished by
including a header file responsible for abstracting the API differences between
python 2 and python 3.
Insert a space on empty lines which are missing a control character.
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
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I frequently receive emailed patches with empty lines represented as "\n\n",
where Mercurial expects them to be "\n \n". patch(1) applies these patches
without complaint, but qpush fails all hunks.
