Index: src/wp-admin/css/common.css
===================================================================
--- src/wp-admin/css/common.css	(revision 35884)
+++ src/wp-admin/css/common.css	(working copy)
@@ -887,6 +887,10 @@
 	padding: 6px 10px 8px;
 }
 
+.misc-pub-revisions .howto {
+	padding-left: 25px;
+}
+
 .misc-pub-filename {
 	word-wrap: break-word;
 }
Index: src/wp-admin/includes/meta-boxes.php
===================================================================
--- src/wp-admin/includes/meta-boxes.php	(revision 35884)
+++ src/wp-admin/includes/meta-boxes.php	(working copy)
@@ -196,15 +196,16 @@
 <div class="misc-pub-section misc-pub-revisions">
 <?php
 	if ( $revisions_to_keep > 0 && $revisions_to_keep <= $args['args']['revisions_count'] ) {
-		echo '<span title="' . esc_attr( sprintf( __( 'Your site is configured to keep only the last %s revisions.' ),
-			number_format_i18n( $revisions_to_keep ) ) ) . '">';
+		$revisions_to_keep_info = '<span class="howto">' . sprintf( __( 'The revisions limit is set to %s.' ),
+			number_format_i18n( $revisions_to_keep ) ) . '</span>';
 		printf( __( 'Revisions: %s' ), '<b>' . number_format_i18n( $args['args']['revisions_count'] ) . '+</b>' );
-		echo '</span>';
 	} else {
+		$revisions_to_keep_info = '';
 		printf( __( 'Revisions: %s' ), '<b>' . number_format_i18n( $args['args']['revisions_count'] ) . '</b>' );
 	}
 ?>
 	<a class="hide-if-no-js" href="<?php echo esc_url( get_edit_post_link( $args['args']['revision_id'] ) ); ?>"><span aria-hidden="true"><?php _ex( 'Browse', 'revisions' ); ?></span> <span class="screen-reader-text"><?php _e( 'Browse revisions' ); ?></span></a>
+	<?php echo $revisions_to_keep_info; ?>
 </div>
 <?php endif;