Close #94 PR: Show when root.

pure.zsh

@@ -117,6 +117,9 @@ prompt_pure_setup() {
 	# show username@host if logged in through SSH
 	[[ "$SSH_CONNECTION" != '' ]] && prompt_pure_username='%n@%m '
 
+	# show username@host if root, with username in white
+	[[ $UID -eq 0 ]] && prompt_pure_username='%F{white}%n%F{242}@%m '
+
 	# prompt turns red if the previous command didn't exit with 0
 	PROMPT='%(?.%F{magenta}.%F{red})❯%f '
 }