To fix the bug in std\format.d lines (from #874)
  if (precision == 0 || !(flags & FLprecision))
    {
    vchar = '0' + vnumber;
    goto L2;
    }
should be changed to
  if (precision == 0 || !(flags & FLprecision))
    {
    if (vnumber < 10)
       vchar = '0' + vnumber;
    else
       vchar = (uc ? 'A' : 'a') + (vnumber - 10);
    goto L2;
    }
It's easy to do.

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