Document more commands added in 0.21.

0.21.0-release-notes.md

@@ -3,6 +3,10 @@
 -   The `os` module has gained the following new commands: `mkdir-all`,
     `symlink` and `rename`.
 
+-   A new `render-styledown` command.
+
+-   A new `str:repeat` command.
+
 -   A new `md` module, currently containing a single function `md:show` for
     rendering Markdown in the terminal.
 

pkg/eval/builtin_fn_styled.d.elv

@@ -122,6 +122,7 @@ fn styled-segment {|object &fg-color=default &bg-color=default &bold=$false &dim
 # See also [`render-styledown`]().
 fn styled {|object @style-transformer| }
 
+#doc:added-in 0.21
 # Renders "styledown" markup into a styled text. For the styledown markup
 # format, see <https://pkg.go.dev/src.elv.sh@master/pkg/ui/styledown>.
 #