I wrote a very basic SEDE query which is open to improvements; but after excluding the false positives, this draft brings up, at least:
Are there any real-life parallels to the Night's Watch and their fall from prestige?
What is the average number of deaths per episode?
Why did other houses not demand this?
How many alien women has Capt/Admiral ...
This is status-bydesign, see the main meta post here:
Yep, this is definitely by design. Block-level elements like blockquotes, code blocks or spoilers won't work in Markdown tables. – Ham Vocke♦
You could probably come up with some weird and funky workaround to still include spoilers in the table but it would most likely have more cons than pros for it.
Per my understanding you can't have linebreaks in comments.
This misunderstanding is caused because only the highlighted yellow area is the comment formatting help, the rest is just general markdown help. This isn't the easiest to tell but you can work it out by looking at the line underneath the yellow area:
collapse | the above section is quoted for ...