include_graphics() fails with knitr 1.49 and later if fig.cap contains a double quote. #2395
Description
Consider this Rmd content:
---
output: html_document
---
```{r fig.cap = ' " '}
knitr::include_graphics("logo.png")
sessionInfo()
```
It compiles nicely for me using knitr 1.48, but fails with 1.49 and 1.50 because the enclosing brackets are replaced with character entity references. In short, fig.cap can no longer contain a double quote character.
