Multi-line alt text, with embedded double quotes, breaks the inclusion of an image

[jennybc]

I discovered this also in some of my packages. The alt text is actually breaking these figures:

originating from:

rvest/vignettes/articles/selectorgadget.Rmd

Lines 62 to 65 in 6c955c0

	#| fig-alt: >
	#| A screenshot of the starwars vignette with an orange box drawn around
	#| the top few lines of the page. SelectorGadget reports "no valid
	#| path found"

It appears that using single quotes instead works:

r-lib/gmailr@5e7b92a