Macro docs tweaks - close #1598

two curly braces are sufficient

templates/config.edn

@@ -180,9 +180,9 @@
 
  ;; Macros replace texts and will make you more productive.
  ;; For example:
- ;; Add this to the macros below:
+ ;; Change the :macros value below to:
  ;; {"poem" "Rose is $1, violet's $2. Life's ordered: Org assists you."}
- ;; input "{{{poem red,blue}}}"
+ ;; input "{{poem red,blue}}"
  ;; becomes
  ;; Rose is red, violet's blue. Life's ordered: Org assists you.
  :macros {}