filename: str, start: str, sep: str, fieldnum: int = 1
) -> Optional[str]:
"""open filename, finds the line starting with the 'start' string.
- Splits the line using seperator and returns a "fieldnum" from the split."""
+ Splits the line using separator and returns a "fieldnum" from the split."""
with open(filename, encoding='utf8') as file:
result = ""
for line in file: