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:

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


This linter is enabled on most of the code base.

This job is configured as tier 2.


This linter provides a --fix option. The python script is doing the change itself.