[Issue 12724] return early from a contract using return

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=12724

Basile-z <b2.temp at gmx.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Error: return statements    |return early from a
                   |cannot be in contracts      |contract using return

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