Hi,
bug or my config ?
with kate (25.04.0-1), i use ruff : format on save
I have a file test1.py :
#!/usr/bin/env python
from pathlib import Path
if __name__ == "__main__":
print("hello")
I create symlink test2.py from test1.py (usually in ~/.local/bin/)
When I edit test1.py, and save (with auto-format), is OK
When i edit test2.py, and save (with auto-format), is KO
result:
#!/usr/bin/env python
from pathlib import Path
if __name__ == "__main__":
print("hello")
from pathlib import Path
if __name__ == "__main__":
print("hello")
with symlink, kate duplicate always all content except the first 2 lines 
if i run ruff format test2.py , it’s ok
if I use in kate : client LSP → format, it’s ok no duplicate
with “shebang” or not, same error
after 3 “save” 
#!/usr/bin/env python
from pathlib import Path
if __name__ == "__main__":
print("hello3")
from pathlib import Path
if __name__ == "__main__":
print("hello")
from pathlib import Path
if __name__ == "__main__":
print("hello2")
from pathlib import Path
if __name__ == "__main__":
print("hello")
from pathlib import Path
if __name__ == "__main__":
print("hello3")
from pathlib import Path
if __name__ == "__main__":
print("hello")
from pathlib import Path
if __name__ == "__main__":
print("hello2")
from pathlib import Path
if __name__ == "__main__":
print("hello")