Original sentence: In some cases, restrictions on HTML may be wisely determined by each site that uses the program.In some wikis (such as Wikipedia and other MediaWiki-based wikis) this convention was abandoned in favor of explicit link markup, e.MediaWiki, the software that runs Wikipedia, has a wiki markup language that allows many common HTML tags; it is intended to provide a alternative syntax to allow some users to use it  without knowing HTML
Edited sentence: In many modern wikis (such as Wikipedia and other MediaWiki-based wikis) this convention was abandoned in favor of explicit link markup, e.In some cases, restrictions on HTML may be determined by each site that uses the program.It is now actually considered poor etiquette on wiki websites to use HTML in place of wiki markup, despite the former option being available.MediaWiki, the software that runs Wikipedia, has a wiki markup language that allows many common HTML tags; it is intended to provide a simple, readable syntax to allow users to use it without knowing HTML