Newline at the end of text files

It will be nice to be able for text files to be saved with newline at the end.

from conversation it looks like LLM acts like it was sent but it is not, always ending with sequence od -> echo empty line >> file

Observing:
when giving instruction "modify existing file so it contains newline at the end", log:

● Update(file)

  ⎿  Error: No changes to make: old_string and new_string are exactly the same.