f-strings round float down too much

[Skaperen]

Output:
lt2a/forums /home/forums 4> cp -ft. /home/phil/foo.py
'/home/phil/foo.py' -> './foo.py'
removed './foo.py'
lt2a/forums /home/forums 5> cat foo.py
from decimal import Decimal
from numpy import nextafter
a = nextafter(0.0,1)
d = Decimal(a)
print('a =',a)
print('d =',d)
print('a =',repr(a))
print(f'a = {a}')
print(f'd = {d}')
print(f'a = {a!r}')
lt2a/forums /home/forums 6> python3.6 foo.py
a = 4.94065645841e-324
d = 4.940656458412465441765687928682213723650598026143247644255856825006755072702087518652998363616359923797965646954457177309266567103559397963987747960107818781263007131903114045278458171678489821036887186360569987307230500063874091535649843873124733972731696151400317153853980741262385655911710266585566867681870395603106249319452715914924553293054565444011274801297099995419319894090804165633245247571478690147267801593552386115501348035264934720193790268107107491703332226844753335720832431936092382893458368060106011506169809753078342277318329247904982524730776375927247874656084778203734469699533647017972677717585125660551199131504891101451037862738167250955837389733598993664809941164205702637090279242767544565229087538682506419718265533447265625E-324
a = 4.9406564584124654e-324
a = 5e-324
d = 4.940656458412465441765687928682213723650598026143247644255856825006755072702087518652998363616359923797965646954457177309266567103559397963987747960107818781263007131903114045278458171678489821036887186360569987307230500063874091535649843873124733972731696151400317153853980741262385655911710266585566867681870395603106249319452715914924553293054565444011274801297099995419319894090804165633245247571478690147267801593552386115501348035264934720193790268107107491703332226844753335720832431936092382893458368060106011506169809753078342277318329247904982524730776375927247874656084778203734469699533647017972677717585125660551199131504891101451037862738167250955837389733598993664809941164205702637090279242767544565229087538682506419718265533447265625E-324
a = 4.9406564584124654e-324
lt2a/forums /home/forums 7>

so, maybe it's fixed in 3.10.