Some comments prevent mangling CSS values

[ericcornelissen]

Bug report

packages/core v0.1.23

Description

The built-in CSS language plugin will not mangle CSS values if there is a comment with either } or ; inside the CSS ruleset before the value to be mangled.

Reproduce

Bug 1

1. Have the following CSS:

   .foobar {
     background-color: var(--color);
     color/*}*/: var(--color);
   }

2. Run WebMangler core v0.1.23 on this CSS with the CSS Language plugin enabled as well as the CSS variable mangler with the pattern [a-z]+.

3. Observe the mangled CSS is:

   .foobar {
     background-color: var(--a);
     color/*}*/: var(--color);
   }

Bug 2

1. Have the following CSS:

   .foobar {
     background-color: var(--color);
     color: /*;*/ var(--color);
   }

2. Run WebMangler core v0.1.23 on this CSS with the CSS Language plugin enabled as well as the CSS variable mangler with the pattern [a-z]+.

3. Observe the mangled CSS is:

   .foobar {
     background-color: var(--a);
     color: /*;*/ var(--color);
   }