f-string comma format adds leading comma for 12 digits (and 15…)

[mMerlin]

CircuitPython version

Adafruit CircuitPython 9.0.5 on 2024-05-22; Adafruit-Qualia-S3-RGB666 with ESP32S3

Code/REPL

v = 1
for _n in range(30):
    l = f'{v:,}'[0:1]
    if l == ',':
        print(f'{v:,}')
    v *= 10

Behavior

,100,000,000,000
,100,000,000,000,000
,100,000,000,000,000,000
,100,000,000,000,000,000,000
,100,000,000,000,000,000,000,000
,100,000,000,000,000,000,000,000,000
,100,000,000,000,000,000,000,000,000,000

Description

When the the number of digits is a multiple of 3, and at least 12, the f-string comma formatting is adding a leading comma.
Using 9.0.5 for the qualia board, due to display glitches with 9.1

Additional information

No response