[Issue 7879] format of class with not const toString()

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=7879

Seb <greensunny12 at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |greensunny12 at gmail.com

--- Comment #4 from Seb <greensunny12 at gmail.com> ---
PR from JackStouffer: https://github.com/dlang/phobos/pull/6207

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