Backed out changeset f020ddf90621 (bug 1612988) for causing webrender…

… bustage CLOSED TREE

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/23091d9bdbcd200e1b535696a5f6d38b41889493

peek-poke/tests/max_size.rs

@@ -52,7 +52,7 @@ fn test_fixed_size_array() {
 
 #[test]
 fn test_tuple() {
-    assert_eq!(<(isize,)>::max_size(), size_of::<isize>());
+    assert_eq!(<(isize)>::max_size(), size_of::<isize>());
     assert_eq!(<(isize, isize, isize)>::max_size(), 3 * size_of::<isize>());
     assert_eq!(<(isize, ())>::max_size(), size_of::<isize>());
 }