Fix up function arguments prose to exclude erroneous "adverbial form"

Author: zoffixznet

doc/Language/functions.pod6

@@ -112,13 +112,12 @@ generated. Both automatic variables can be used that the same time.
 =head2 Arguments
 X<|Argument>
 
-Arguments are supplied as a comma separated list. To disambiguate nested calls
-parentheses or adverbial form can be used.
+Arguments are supplied as a comma separated list. To disambiguate nested calls,
+use parentheses:
 
     sub f(&c){ c() * 2 }; # call the function reference c with empty parameter list
     sub g($p){ $p - 2 };
-    say(g(42)); # nest call to g in call to say
-    f: { say g(666) }; # call f with a block
+    say(g(42), 45); # pass only 42 to g()
 
 When calling a function, positional arguments should be supplied
 in the same order as the function's signature.  Named arguments