comark/sources/invalid-cite · Write source numbers inside :cite

:cite holds the numbers of the sources it cites, such as :cite[2] or :cite[1,3]. A marker with anything else inside, or nothing, can't link to a source, so it renders nothing and the claim it backs loses its citation.

Incorrect

Pigeons find home by the sun :cite[Magnetoreception].

::sources
1. [Magnetoreception](https://en.wikipedia.org/wiki/Magnetoreception)
::

lint-comark example.mdexample.md:1:1 comark/sources/invalid-cite:cite 1 needs source numbers inside it, such as :cite[2] or :cite[1,3].Change the block as the message says.✖ 1 problem

Correct

Pigeons find home by the sun :cite[1].

::sources
1. [Magnetoreception](https://en.wikipedia.org/wiki/Magnetoreception)
::

lint-comark example.md✔ No problems