latex_use_modeindex deprecation warning always thrown

[JDWarner]

Scikit-Image does not set or change the default value for this config parameter in our doc build - indeed, searching for latex_use_modeindex in our repo yields no results at all.

However, we require the doc build to complete without warnings. It seems with completely default settings, this is throwing a warning on Sphinx 1.5. As a result, all of our continuous integration builds are failing. The warning is thrown from this line in Sphinx.

See log here: https://travis-ci.org/scikit-image/scikit-image/jobs/182043593
In reference to recently merged PR scikit-image/scikit-image#2366, which passed with flying colors in the PR Travis build.

[tk0miya]

Really? It seems your project sets False value.
https://github.com/scikit-image/scikit-image/blob/master/doc/source/conf.py#L277

[tk0miya]

Oh, sorry. I understand. There is a typo in our warning message.
latex_use_modindex was deprecated, not mod-"e"-index.
I will fix the message later.

Thank you for letting me know!

[tk0miya]

Fixed at e6ca4ee.