sstephenson/prototype — comment on commit bd3965d82d8736132c76b17252232f54980b0772
File: src/prototype/lang/array.js line 584
By jdalton:

Should be `_reduce.call(this, iterator.bind(context), memo);` there is no `context` argument in `Array#reduce`.
http://es5.github.com/#x15.4.4.21