Bug#738735: linop: FTBFS: dh_sphinxdoc: Sphinx documentation not found

[Ghislain Vaillant]

Builds of linop covering only its architecture-dependent binary
packages and skipping its architecture-independent -doc package (as on
the autobuilders) have been faiing:

     dh_sphinxdoc -a -O--buildsystem=pybuild
  dh_sphinxdoc: Sphinx documentation not found
  make: *** [binary-arch] Error 2

> Could you provide the detailed steps to reproduce this bug. I have
only tested the build locally on my machine via pbuilder prior to
submitting the package and it went fine.

Please arrange to invoke dh --with sphinxdoc only when it would have
something to do.

> Sorry but that does not speak to me either. I followed the most recent
iteration of the Python library style guide
(https://wiki.debian.org/Python/LibraryStyleGuide). Please provide an
example or more verbose explanations regarding the solution you
propose. 

Thanks!

> Cheers,
> Ghis