Fix typo: $bar --> $baz, plus parameter/argument terminology fix
@@ -419,14 +419,15 @@ For example:
## Method calls
Method calls consist of an expression followed by the dot or question-dot
-operator, and an identifier with a number of positional parameters:
+operator, and an identifier with a number of arguments for positional
+parameters:
`<EXPR>.<IDENT>(<EXPR>,...)`
For example:
-* `$foo.bar($baz)` calls the `bar` method on `$foo` with a parameter of `$bar`
-* `$foo?.bar(1, 2)` calls the `bar` method on `$foo` with the parameters `1`
+* `$foo.bar($baz)` calls the `bar` method on `$foo` with an argument of `$baz`
+* `$foo?.bar(1, 2)` calls the `bar` method on `$foo` with the arguments `1`
and `2` only if `$foo` is non-`null`
See the [methods reference](methods.md) for a list of all methods that are
