comark/annotate/compare-same-image · Show two different images in a ::compare

A compare whose two screenshots are the same image shows no change, which usually means the after capture was never taken or its path was copied from the before one.

Incorrect

::compare
:::screenshot{src="/pond.png" alt="The pond with no fence"}
:::

:::screenshot{src="/pond.png" alt="The pond with a fence"}
:::
::

lint-comark example.mdexample.md:1:1 comark/annotate/compare-same-imagecompare 1: both screenshots show "/pond.png", so there's no change to see.Point the after screenshot at the new capture.✖ 1 problem

Correct

::compare
:::screenshot{src="/pond-before.png" alt="The pond with no fence"}
:::

:::screenshot{src="/pond-after.png" alt="The pond with a fence"}
:::
::

lint-comark example.md✔ No problems