Tabs not rendered in rmarkdown

Question

After updating R and Rstudio for other reasons, {.tabset} is no longer working in rmarkdown.

Here is the html code produced before the update (I've removed > to make the code visible in this html):

div id="combined-plot" class="section level2 tabset"
h2 Combined Plot /h2

And here's the code produced after the update:

p ##Combined Plot {.tabset}

Here's what I've tried so far which hasn't worked:

• Completely uninstalled R studio and all versions of R and reinstalled
• installed pandoc 2.9 because of issues identified with pandoc 2.8 (https://github.com/rstudio/rmarkdown/issues/1723)
• Uninstalled pandoc 2.9, Rstudio, and R again and reinstalled R studio (with included pandoc 2.7) and R

• Observed rtools not installed warning so I followed instructions of (https://github.com/rstudio/rstudio/issues/3563) and defined the path with the following code:

  Sys.setenv(PATH = paste("C:/rtools/usr/bin", Sys.getenv("PATH"), sep=";"))
  
  Sys.setenv(BINPREF = "C:/rtools/mingw64/bin/")
  
  Sys.setenv(BINPREF64 = "C:/rtools/mingw64/bin/")
  

  find_rtools(T) output was TRUE

• I uninstalled R and reinstalled R and ran this path code before installing all my packages.

Nothing has worked so far so any suggestions would be greatly appreciated!!!

Answer 1

The error is very simple: just add a whitespace between H2 header ## and the text: ## graphed Data {.tabset} instead of ##graphed Data {.tabset}

WRONG:

##Tabulated Data {.tabset}

RIGHT:

## Tabulated Data {.tabset}