Fix StorageTest on MSVC.
Fix StorageTest on MSVC.

MSVC outputs %g with a 3-digit instead of a 2-digit exponent.

wpilibsuite/ntcore,robotdotnet/ntcore,robotdotnet/ntcore,333fred/ntcore,wpilibsuite/ntcore,333fred/ntcore,wpilibsuite/ntcore,robotdotnet/ntcore,robotdotnet/ntcore,333fred/ntcore,wpilibsuite/ntcore,333fred/ntcore