Updating the examples for across() to include an example for everything()

Fixes #7621

Author: JBrandenburg02

NEWS.md

@@ -1,5 +1,7 @@
 # dplyr (development version)
 
+* Updated `across()` examples to include an example using `everything()` (#7621, @JBrandenburg02).
+
 * Clarified how `slice_min()` and `slice_max()` work in the introduction vignette (#7717, @ccani007).
 
 * `reframe()` has moved from experimental to stable (#7713, @VisruthSK).

R/across.R

@@ -105,6 +105,10 @@
 #' iris <- as_tibble(iris)
 #'
 #' # across() -----------------------------------------------------------------
+#' # Using everything() to apply the same function to all columns
+#' iris |>
+#'   mutate(across(everything(), as.character))
+#'
 #' # Different ways to select the same set of columns
 #' # See <https://tidyselect.r-lib.org/articles/syntax.html> for details
 #' iris |>