HTML not stripped from page title

[ramiromagno]

Beginning of roxygen2 comment block:

#' \R's fundamental data type at C level
#'
#' @description
#' (...)

leads to this html page (please notice the html code surfacing in the html rendered output):

It works fine though in RStudio's help page:

So it seems that backslash in \R is messing up the parser.

[hadley]

The problem is that the page <title> includes <span class="R">R</span> which is not valid HTML.