Emitting newline at end when writing JSON to file with to_writer_pretty

[linclelinkpart5]

Hello, I'm having trouble figuring out how to emit a newline at the end of a file write using serde_json. These JSON files I'm serializing get added to a git repo, and diff complains about the lack of newlines at the end. Not to mention, cat-ing these files out messes with the display.

I'd love for there to be a flag on the *Formatter traits to allow this, but there doesn't seem to be one. Is there an easy fix that I'm overlooking? Thanks!

[dtolnay]

I would prefer not to introduce a formatter flag for this. You could write the newline like this:

use std::io::Write;

serde_json::to_writer_pretty(&mut writer, value)?;
writer.write_all(b"\n")?;

[piegamesde]

I think that ending the output with a newline should be the default behavior for pretty formatting. I don't think there are many situations where one would want pretty formatting but without a trailing newline