Update element description when modifying multiple rules

R/theme_settings.R

 element_description <- function(element) {
   out <- rep("", length(element))
   multiple <- grepl("multiple", element)
-  out[multiple] <- "Modifies multiple CSS classes or elements."
+  out[multiple] <- "Used in multiple CSS rules."
 
   ifelse(
     multiple | is.na(element) | element == "",

tests/testthat/test-helpers.R

 test_that("element_description", {
   text_in <- c("multiple", NA, "", ".remark-slide-content", "h1", "pre, code")
   text_out <- c(
-    "Modifies multiple CSS classes or elements.",
+    "Used in multiple CSS rules.",
     "",
     "",
     "Modifies the `.remark-slide-content` class.",