Rollback underlines for top level links

[tompave]

Commit d86ad65 introduced text-decoration: underline; for the top-level links in each module page.

With ex_doc 0.18.1:

Now, with ex_doc 0.18.2:

This is arguably less than ideal for source code and a monospace font, as it can be difficult to distinguish between the underline and the underscore characters.

Would it be possible to revert that change?

[josevalim]

Reverting. /cc @LostKobrakai

[josevalim]

Done!

[tompave]

Whoohooo! Thanks! 👍