in ml/trl_rlhf_data.py [0:0]
def common_start(str1: str, str2: str) -> str:
# Zip the two strings and iterate over them together
common_chars = []
for c1, c2 in zip(str1, str2):
if c1 == c2:
common_chars.append(c1)
else:
break
# Join the common characters and return as a string
return "".join(common_chars)