Doc tweaks

doc/reference/std/cli/multicall.md

@@ -5,7 +5,9 @@ the behavior of which differs depending on the name of the binary,
 just like the gerbil binary itself, or famously like `busybox`.
 
 ::: tip usage
+```scheme
 (import :std/cli/multicall)
+```
 :::
 
 An earlier version of this library used to be available as `:clan/multicall`
@@ -64,7 +66,7 @@ return a getopt-spec (suitable to be passed to `(apply getopt ...)`) of
 Register the function as entry-point,
 with given `name` (argument passed to `make-symbol`),
 or if not specified, a symbol made of only the
-[`easy-shell-characters?`](shell.md) of `id`.
+`easy-shell-characters?` of `id`.
 The entry-point will have the given `help` and `getopt` fields.
 
 ### define-entry-point

doc/reference/std/cli/print-exit.md

@@ -5,7 +5,9 @@ invoked either from the Scheme REPL or the Unix CLI, and in either case
 will print their computation results after their invocation.
 
 ::: tip usage
+```scheme
 (import :std/cli/print-exit)
+```
 :::
 
 The facilities are named in a way reminiscent of REPL (Read-Eval-Print-Loop),