Index: src/wp-content/themes/twentyten/blocks.css
===================================================================
--- src/wp-content/themes/twentyten/blocks.css	(revision 45303)
+++ src/wp-content/themes/twentyten/blocks.css	(working copy)
@@ -55,7 +55,7 @@
 }
 
 .wp-block-image figcaption {
-	margin: -7px 0 20px;;
+	margin: -7px 0 20px;
 	padding: 9px 9px 1.0em;
 	text-align: center;
 }