Output with --stdout flag contains an additional newline compared to without the flag

[magnunm]

Compared to the result of modifying the file, the output with --stdout contains an additional newline at the end of the file. As I set up my editor to use the stdout to format the file, this would add a extra newline when I run the formatting.

The cause is the print statements here: __main__.py#L257-L270, as print adds a newline at the end. Have changed it to the way I prefer in my local copy by adding end="" to those print statements. Unless the extra newline is in fact wanted, I can make a PR with that change.

How to reproduce:
In an initialized, empty project, run:

$ echo "print('Some test code')" > test.py
$ cat test.py
print('Some test code')
$ darker --stdout test.py
print("Some test code")

$ darker test.py && cat test.py
print("Some test code")

Environment:
darker: commit c5d0f68
python: 3.10
shell: GNU bash

[akaihola]

Thanks @magnunm for the report! I vaguely remember some issue with final newlines when implementing --stdout, but can't of course remember any of the details now. Your example seems to clearly indicate wrong behavior, and a fix should definitely be introduced.

Feel free to make a PR if you have time!