[Issue 1654] Array concatenation result should be implicitly castable between mutable and immutable if the elements support it.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=1654

Steven Schveighoffer <schveiguy at yahoo.com> changed:

           What    |Removed                     |Added
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            Summary|Array concatenation should  |Array concatenation result
                   |result in mutable or        |should be implicitly
                   |invariant depending on      |castable between mutable
                   |usage                       |and immutable if the
                   |                            |elements support it.

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