Docs: showcase of tinytheme() plots not displaying properly on website

[grantmcdermott]

See the very final example here: https://grantmcdermott.com/tinyplot/man/tinytheme.html#examples

Seems to be an issue related to knitr and the plots being produced within a for loop.

tinyplot/R/tinytheme.R

Lines 80 to 93 in 7ed11e4

	#' # Themes showcase
	#' ## We'll use a slightly more intricate plot (long y-axis labs and facets)
	#' ## to demonstrate dynamic margin adjustment etc.
	#'
	#' thms = eval(formals(tinytheme)$theme)
	#'
	#' for (thm in thms) {
	#' tinytheme(thm)
	#' tinyplot(
	#' I(Sepal.Length*1e4) ~ Petal.Length | Species, facet = "by", data = iris,
	#' main = "Demonstration of tinyplot themes",
	#' sub = paste0('tinytheme("', thm, '")')
	#' )
	#' }

Tracking upstream here: yihui/knitr#2392

[grantmcdermott]

Fixed with #425