Index: src/wp-content/themes/twentyfifteen/style.css
===================================================================
--- src/wp-content/themes/twentyfifteen/style.css	(revision 30508)
+++ src/wp-content/themes/twentyfifteen/style.css	(working copy)
@@ -406,6 +406,7 @@
 	border-spacing: 0;
 	border-width: 1px 0 0 1px;
 	margin: 0 0 1.6em;
+	table-layout: fixed; /* Prevents HTML tables from becoming too wide */
 	width: 100%;
 }