error [unbalanced-delimiters] message: 'Invalid polymer expression delimiters. You put '{{}}'' appears on minified css

[atolk]

Description

Polymer lint doesn't properly recognize minified css expressions

Versions & Environment

Polymer CLI: 0.18.1

Steps to Reproduce

Put next css into any element style:
@media (max-width: 600px) { .hide-on-small-only{display:none !important;}}
note last two curly brackets followed one by one.
When there is a space between them all just fine.

[stale]

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[stale]

This issue has been automatically closed after being marked stale. If you're still facing this problem with the above solution, please comment and we'll reopen!