Fix minor typo (nushell#1666)

lfrancke · web-flow · commit 8c74c131f5be · 2024-12-06T17:53:37.000+08:00
diff --git a/book/custom_commands.md b/book/custom_commands.md
@@ -642,7 +642,7 @@ multi-greet Elin Lars Erik
 # => Hello, Erik!
 ```
 
-We could call the above definition of the `greet` command with any number of arguments, including none at all. All of the arguments are collected into `$name` as a list.
+We could call the above definition of the `greet` command with any number of arguments, including none at all. All of the arguments are collected into `$names` as a list.
 
 Rest parameters can be used together with positional parameters:
 
