Added more precision to the predefined URLs and titles feature.
Added more precision to the predefined URLs and titles feature.

n054/php-markdown,ashur/php-markdown,MWDelaney/bootstrap-3-shortcodes,filipstefansson/bootstrap-3-shortcodes,queirozfcom/php-markdown-with-syntax-highlight,drosenstark/php-markdown,filipstefansson/bootstrap-3-shortcodes,MWDelaney/bootstrap-3-shortcodes,robbieaverill/php-markdown,MWDelaney/bootstrap-3-shortcodes,nazar-pc/php-markdown-next,mariokonrad/php-markdown,c9s/php-markdown,alganet/ElephantMarkdown,itafroma/php-markdown,Kapeli/php-markdown,jockchou/php-markdown,TypeFriendly/PHP-Markdown