Twenty Sixteen: Correct display of italics in citations.

Props gaelbonithon, sabernhardt, poena, manhar, westonruter, SergeyBiryukov.
Fixes #65107.

git-svn-id: https://develop.svn.wordpress.org/trunk@62432 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-content/themes/twentysixteen/css/editor-blocks.css

@@ -349,6 +349,11 @@ figure[class*="wp-block-"] > figcaption {
 	font-style: normal;
 }
 
+.wp-block-quote__citation em,
+.wp-block-quote__citation i {
+	font-style: italic;
+}
+
 .wp-block-quote strong,
 .wp-block-quote b {
 	font-weight: 400;

src/wp-content/themes/twentysixteen/style.css

@@ -385,6 +385,11 @@ blockquote cite {
 	font-style: normal;
 }
 
+blockquote :where(cite) em,
+blockquote :where(cite) i {
+	font-style: italic;
+}
+
 blockquote strong,
 blockquote b {
 	font-weight: 400;