[Issue 21338] Move functional style code's unit tests outside scope, to actually test them.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21338

Richard Cattermole <alphaglosined at gmail.com> changed:

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

--- Comment #1 from Richard Cattermole <alphaglosined at gmail.com> ---
This appears to be a symbol lookup bug associated with importing of the std
package module.

Adding:

import std.uni : isWhite;

Fixes it due to conflicts with std.ascii.

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