[Issue 9119] [AA] Forward range addition to associative arrays.

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=9119

--- Comment #13 from hsteoh at quickfur.ath.cx ---
Furthermore, printing of the range returned by byPair() produces output of the
form:

-----
immutable(Tuple!(string, int))("a", 123)
immutable(Tuple!(string, int))("b", 234)
immutable(Tuple!(string, int))("c", 345)
-----

So the printing issue is also taken care of.

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