[Issue 20262] CustomFloat.mant_dig gives wrong value

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20262

Berni <dlang at croco-puzzle.com> changed:

           What    |Removed                     |Added
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            Summary|CustomFloat.mant_dig        |CustomFloat.mant_dig gives
                   |                            |wrong value

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