Following up, because this thread will come up when someone searches for poetry (or tiddlers with poems):
Poetry curators like @talha131 will surely be interested in this solution with thanks to pmario for recent post – link here to documentation at TiddlyWiki.com for getting line breaks in poetry to render naturally in TiddlyWiki. It’s simple enough that I’ll just paste it in below, tailored to poetry-specific use:
Assuming you have a poem tag on each poem tiddler, all you need is a tiddler tagged $:/tags/Stylesheet with the following:
[data-tags*="poem"] .tc-tiddler-body {
word-break: normal;
word-wrap: break-word;
white-space: pre-wrap;
}