Add a status for unprefixed line-clamp (not supported at all yet) (#977)

feature-group-definitions/line-clamp.dist.yml

@@ -0,0 +1,16 @@
+# Generated from: line-clamp.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+name: line-clamp
+description: "The `line-clamp` CSS property limits the text in a block container to a certain number of lines. The prefixed `-webkit-line-clamp` is widely supported but only works with `-webkit-box-orient: vertical` in combination with `display: -webkit-box` or `display: -webkit-inline-box`."
+spec: https://drafts.csswg.org/css-overflow-4/#line-clamp
+caniuse: css-line-clamp
+# Since BCD has an entry for -webkit-line-clamp but none for unprefixed
+# line-clamp, we need an override to represent that no browser supports this. If
+# https://github.com/mdn/browser-compat-data/pull/22951 is merged, this can be
+# removed:
+status:
+  baseline: false
+  support: {}
+compat_features:
+  - css.properties.-webkit-line-clamp

feature-group-definitions/line-clamp.yml

@@ -1,4 +1,11 @@
 name: line-clamp
-description: The `line-clamp` CSS property limits the text in a block container to a certain number of lines.
-spec: https://drafts.csswg.org/css-overflow-3/#line-clamp
+description: "The `line-clamp` CSS property limits the text in a block container to a certain number of lines. The prefixed `-webkit-line-clamp` is widely supported but only works with `-webkit-box-orient: vertical` in combination with `display: -webkit-box` or `display: -webkit-inline-box`."
+spec: https://drafts.csswg.org/css-overflow-4/#line-clamp
 caniuse: css-line-clamp
+# Since BCD has an entry for -webkit-line-clamp but none for unprefixed
+# line-clamp, we need an override to represent that no browser supports this. If
+# https://github.com/mdn/browser-compat-data/pull/22951 is merged, this can be
+# removed:
+status:
+  baseline: false
+  support: {}