Linter false positive on background images

[18f]

Linter false positive on background images

[rogeruiz]

There's discussion around this here, sds/scss-lint#114.

This comment is what lead to closing the discussion, sds/scss-lint#114 (comment).

Essentially, not all errors are bad. This might be a good chance to add a PR to scss-lint to be more in line with CSSLint, https://github.com/CSSLint/csslint/wiki/Disallow-duplicate-properties

[maya]

@rogeruiz yes, I think something like CSSLint would resolve this issue. 👍 Even though not all warnings are bad, I think it will get confusing to have a lot of warnings bc it will be hard to tell what's a new warning that should be addressed.

[msecret]

We could also use a mixin for handling the two backgrounds.

[msecret]

We could also use a mixin for handling the two backgrounds.