Comment 0 for bug 1736313

Similar to bug 1687540, the zsh completion file seems to have unsorted
elements. See for example this reproducible builds failure:
https://tests.reproducible-builds.org/archlinux/community/calibre/calibre-3.13.0-1-x86_64.pkg.tar.xz.html

Other than this it seems calibre is fully reproducible. :)

Attached are three files:
1) Permanent copy of the reproducible builds results as generated by
diffoscope

2) A patch to sort the options for various ebook-convert functions; with
this patch, repeated runs of `python2 setup.py install` produce the same
zsh completion

3) A diff of the zsh completion file before and after the change,
confirming that it does nothing other than sort the parameters passed to
`_arguments -s`.

 affects calibre