Regenerate document and add a test to ensure no missing scale_color_*() (#4134)

* Regenerate document

* Add a test to confirm no missing scale_color_*

* Fix regex pattern

Author: yutannihilation

man/scale_viridis.Rd

@@ -370,3 +370,15 @@ test_that("scale_apply preserves class and attributes", {
   expect_false(inherits(out, "foobar"))
   expect_null(attributes(out))
 })
+
+test_that("All scale_colour_*() have their American versions", {
+  # In testthat, the package env contains non-exported functions as well so we
+  # need to parse NAMESPACE file by ourselves
+  exports <- readLines(system.file("NAMESPACE", package = "ggplot2"))
+  colour_scale_exports <- grep("export\\(scale_colour_.*\\)", exports, value = TRUE)
+  color_scale_exports <- grep("export\\(scale_color_.*\\)", exports, value = TRUE)
+  expect_equal(
+    colour_scale_exports,
+    sub("color", "colour", color_scale_exports)
+  )
+})