Formatting adds newline at the end on file on each format

[sirideain]

Running rustfmt adds a single newline no matter how many times I run it. Every time I format here, an extra newline is added at the end of the file.

Windows 10
VS Code
VSCode-Rust extension setup to use RLS

[nrc]

Observation:

• If there are no trailing newlines, rustfmt adds one (correct)
• If there is one trailing newline, rustfmt adds another one (incorrect)
• If there are more than one trailing newlines, rustfmt does nothing (incorrect)

I expect that we are not passing the last newline (if it exists) to rustfmt.