Explain table WikiText handling TODO comment

[andrewgoz]

The caption processing is best explained using two WikiText tables:

|shown above table|c
|!h1|!h2|h
|d1|d2|

and

|!h1|!h2|h
|d1|d2|
|shown below table|c

in both cases the HTML <caption> element is made the first child of the <table> element - as it should be.

I also changed the slice() to unshift(), because I find the latter more clear. The comment associated with that was simply wrong.

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✅ Change Note Status

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📝 $:/changenotes/5.4.0/#9803

Type: enhancement | Category: usability
Release: 5.4.0

Re-enable WikiText table caption positioning

🔗 #9803

👥 Contributors: andrewg_oz

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[andrewgoz]

Added release note

[linonetwo]

What does TODO comment mean here? Did you see #6865

[andrewgoz]

What does TODO comment mean here? Did you see #6865

This is unrelated to #6865. The TODO is referring to TiddlyWiki Classic code that was disabled, apparently because it was not understood at the time code was being ported to TiddlyWiki 5. It's a bit disappointing, because it means TW5 has never been backward-compatible with this little detail of TWC table caption handling.

This PR is draft because I want to update WikiText examples. I hope to do that in a week or two.