# Trailing whitespaces

This linter verifies if a file has:

- unnecessary trailing whitespaces,
- Windows carriage return,
- empty lines at the end of file,
- if file ends with a newline or not

## Run Locally

This mozlint linter can be run using mach:

```{eval-rst}
.. parsed-literal::

    $ mach lint --linter file-whitespace <file paths>

```

## Configuration

This linter is enabled on most of the code base.

This job is configured as [tier 2](https://wiki.mozilla.org/Sheriffing/Job_Visibility_Policy#Overview_of_the_Job_Visibility_Tiers).

## Autofix

This linter provides a `--fix` option.

## Sources

- {searchfox}`Configuration (YAML) <tools/lint/file-whitespace.yml>`
- {searchfox}`Source (Rust) <tools/lint/mozcheck/src/file_whitespace.rs>`