Add another example that seemed to be missing

Author: prammer

S07-lists.pod

@@ -58,6 +58,7 @@ treated as a single argument to the C<for> loop, thus the name of the rule.
     for [1, 2, 3] { }       # Array of 3 things (put in Scalars); 3 iterations
     for @a, @b { }          # List of 2 things; 2 iterations
     for (@a,) { }           # List of 1 thing; 1 iteration
+    for (@a) { }            # List of @a.elems things; @a.elems iterations
     for @a { }              # List of @a.elems things; @a.elems iterations
 
 The first two are equivalent because parentheses do not actually construct a