The fjson file should keep the "display_toc" option

[javiereguiluz]

In the *.fjson files generated by Sphinx, there's a boolean option called display_toc. Sphinx explains it as follows:

display_toc
    A boolean that is True if the toc contains more than one entry.

Source: https://www.sphinx-doc.org/en/1.0/builders.html#serialization-builder-details

This is used in some parts of Symfony to decide if the TOC is displayed or not. So we should probably keep it for compatibility. Thanks!

[fabpot]

Actually, now that toc is an array and not an HTML snippet, we don't need the display_toc anymore as we do have the information via toc directly.

[javiereguiluz]

Great. Let's close then. Thanks!

[fabpot]

Migration path: page.display_toc to page.toc|length > 1