Index: wp-admin/includes/class-wp-posts-list-table.php
===================================================================
--- wp-admin/includes/class-wp-posts-list-table.php	(revision 39142)
+++ wp-admin/includes/class-wp-posts-list-table.php	(working copy)
@@ -1230,7 +1230,7 @@
 				__( 'Edit' )
 			);
 			$actions['inline hide-if-no-js'] = sprintf(
-				'<a href="#" class="editinline" aria-label="%s">%s</a>',
+				'<button class="button-link editinline" aria-label="%s" type="button">%s</button>',
 				/* translators: %s: post title */
 				esc_attr( sprintf( __( 'Quick edit &#8220;%s&#8221; inline' ), $title ) ),
 				__( 'Quick&nbsp;Edit' )
Index: wp-admin/js/inline-edit-post.js
===================================================================
--- wp-admin/js/inline-edit-post.js	(revision 39142)
+++ wp-admin/js/inline-edit-post.js	(working copy)
@@ -49,7 +49,7 @@
 		});
 
 		// add events
-		$('#the-list').on( 'click', 'a.editinline', function( e ) {
+		$('#the-list').on( 'click', '.editinline', function( e ) {
 			e.preventDefault();
 			inlineEditPost.edit(this);
 		});