Bug#875711: qemu: please make the documentation reproducible

[Vagrant Cascadian]

Source: qemu
Version: 1:2.8+dfsg-7
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: randomness
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

While working on the Reproducible Builds effort [0], we noticed that
qemu's documentation and manpages generates non-reproducible output,
possibly based on which shell is set to /bin/sh and the handling of
whitespace in the corresponding echo implementation[1].

I believe the attached patch should resolve this issue by removing
trailing whitespace from two lines in the file used to generate the
documentation, though I haven't confirmed for sure.

 [0] https://reproducible-builds.org/
 [1] https://tests.reproducible-builds.org/debian/rb-pkg/buster/amd64/diffoscope-results/qemu.html

live well,
  vagrant

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