https://issues.dlang.org/show_bug.cgi?id=12890

          Issue ID: 12890
           Summary: std.array index based replace
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: Phobos
          Assignee: nobody@puremagic.com
          Reporter: safety0ff.bugz@gmail.com

Currently there is some 3+ year old code commented out in std.array: https://github.com/D-Programming-Language/phobos/blob/master/std/array.d#L1921 and: https://github.com/D-Programming-Language/phobos/blob/master/std/array.d#L2076

This code is for replace with signature:
T[] replace(T, Range)(T[] subject, size_t from, size_t to, Range stuff)

Either we remove the commented out code or uncomment is and verify that it is still correct.

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