[Issue 19529] An example from Wikipedia does not compile

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19529

Adam D. Ruppe <destructionator at gmail.com> changed:

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

--- Comment #5 from Adam D. Ruppe <destructionator at gmail.com> ---
The author there just forgot the ! for template arguments.

being a wiki, i just hit edit and added them.
https://en.wikibooks.org/w/index.php?title=D_Programming/Mixins&stable=0

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