patch -e from stdin broken?

[pedro_alves@portugalmail.pt]

Hi guys,

While looking at why 'quilt annotate' is broken in Cygwin, I found
something fishy on 'patch' in ed mode.  Looks like reading the patch
from stdin is broken.  Reading the patch from a file with -i works
ok.  Here is how to reproduce:

$ touch a.txt

$ cat << EOF > b.txt
> a new line
> EOF

$ diff -e a.txt b.txt > ab.diff

$ cat ab.diff
0a
a new line

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