dev-cmd/sh.rb: update usage banner

Library/Homebrew/dev-cmd/sh.rb

@@ -10,7 +10,7 @@ module Homebrew
   def sh_args
     Homebrew::CLI::Parser.new do
       usage_banner <<~EOS
-        `sh` [<options>] [<commands>]
+        `sh` [<options>] [<script>]
 
         Homebrew build environment that uses years-battle-hardened
         build logic to help your `./configure && make && make install`

docs/Manpage.md

@@ -1106,7 +1106,7 @@ Run a Ruby instance with Homebrew's libraries loaded, e.g.
 * `-e`:
   Execute the given text string as a script.
 
-### `sh` [*`options`*] [*`commands`*]
+### `sh` [*`options`*] [<script>]
 
 Homebrew build environment that uses years-battle-hardened
 build logic to help your `./configure && make && make install`