Accommodate non-trivial background-image css definitions

[codycushing]

Looks like the regex is not accounting for characters between url( and /* (no)embed */, causing other valid css syntax to be skipped. For example, these images are not picked up:

background: transparent url(../img/menu.svg) center center no-repeat; /* embed */
background-image: -webkit-image-set(url("../img/Billing-Icon.png") 1x, url("../img/Billing-Icon_2x.png") 2x); /* embed */

[mihhail-lapushkin]

Well, you are excluding/including URLs, not CSS properties, so the comment should go right after the appropriate URL:

background: transparent url(../img/menu.svg) /* embed */ center center no-repeat;
background-image: -webkit-image-set(url("../img/Billing-Icon.png") /* embed */ 1x, url("../img/Billing-Icon_2x.png") /* embed */ 2x);