alias 'notes:' alias for md speaker note separator #1913

plugin/markdown/markdown.js

@@ -18,7 +18,7 @@
 }( this, function( marked ) {
 
 	var DEFAULT_SLIDE_SEPARATOR = '^\r?\n---\r?\n$',
-		DEFAULT_NOTES_SEPARATOR = 'note:',
+		DEFAULT_NOTES_SEPARATOR = 'notes?:',
 		DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR = '\\\.element\\\s*?(.+?)$',
 		DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR = '\\\.slide:\\\s*?(\\\S.+?)$';