[gtk/gtk-3-24: 1/2] document font-feature-settings CSS property

[Matthias Clasen <matthiasc src gnome org>]

commit e618a49d71d4002cfb123fb06d5f1ee88c2942ce
Author: Lukas K <lu 0x83 eu>
Date:   Wed Feb 26 21:51:31 2020 +0100

    document font-feature-settings CSS property
    
    introduced in 2e2b6478

 docs/reference/gtk/css-properties.xml | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/docs/reference/gtk/css-properties.xml b/docs/reference/gtk/css-properties.xml
index 310cc6bac3..a4352ff547 100644
--- a/docs/reference/gtk/css-properties.xml
+++ b/docs/reference/gtk/css-properties.xml
@@ -229,6 +229,15 @@ We use <literallayout> for syntax productions, and each line is put in a <code>
               <entry></entry>
               <entry></entry>
             </row>
+            <row>
+              <entry><phrase role="nowrap">font-feature-settings</phrase></entry>
+              <entry><code>〈feature-tag-value〉&num; </code></entry>
+              <entry>""</entry>
+              <entry>✓</entry>
+              <entry>></entry>
+              <entry><ulink 
url="https://www.w3.org/TR/css3-fonts/#font-feature-settings-prop";>CSS3</ulink></entry>
+              <entry></entry>
+            </row>
           </tbody>
         </tgroup>
         <tgroup cols="5">