[Issue 19147] Reduce template bloat in std.complex by using const arguments

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19147

Basile B. <b2.temp at gmx.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |pull

--- Comment #2 from Basile B. <b2.temp at gmx.com> ---
take care with the tittle, this could have an impact on the change log. If you
wanted to say that you handle this issue then use the "assignee" field or add
the pull keyword.

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