[css-fonts] Missing serialisation for 0 ranged descriptors inside @font-face #7925
Description
In the spec there is no specification on whether 0 ranged font-stretch, font-style and font-weight descriptors inside @font-face rule should be simplified or not. E.g., if font-weight: 200 200; is specified inside @font-face then it's not clear on whether rule.style.getPropertyValue("font-weight") should return 200 or 200 200. Chrome and Safari are currently returning 200 200 while Firefox is returning just 200.
The issue was also discussed in the conversation in WPT PR #36489