Correct mixed list/item assignment example, dogbert17++

Author: moritz

doc/Language/variables.pod6

@@ -120,10 +120,10 @@ larger expression determines the assignment type:
     my ( @array, $num );
     @array = $num = 42, "str";    # list assignment
     say @array.perl;              # OUTPUT: «[42, "str"]␤»
-    say $num.perl;                # OUTPUT: «[42, "str"]␤»
+    say $num.perl;                # OUTPUT: «42␤»
 
-This is because the whole expression is C<@array = $num = 42, "str">, while
-C<$num = 42> is not is own separate expression.
+The assignment expression is parsed as C<@array = (($num = 42), "str")>,
+because item assignment has tighter precedence than the comma.
 
 See L<operators|/language/operators> for more details on precedence.