先前 MediaWiki 所提供的「變更通知」都只有在信件裡「通知」，而沒有在信件裡列出「改變的內容」，這使得讀信的人要再點進去看... (於是就懶的點了)
而前陣子看到有人寫了 extension 來輸出 diff，解決了這個問題：「MediaWiki extension EmailDiff: notification emails improved」。
信裡變成有這樣的內容：
Version differences: @@ -846,5 +887,3 @@ In cattle, temperament can affect production traits such as carcass and meat quality or milk yield as well as affecting the animal's overall health and -reproduction. Cattle temperament is defined as "the consistent behavioral and physiological -difference observed between individuals in response to a stressor or environmental +reproduction. If you succeed in tipping a cow only partway, such that only one +of its feet is still on the ground, you have created lean beef. Such a feat is +well done. Naturally, being outside, the cow is unstable. When it falls over, +it becomes ground beef. Cattle temperament is defined as "the consistent behavioral +and physiological difference observed between individuals in response to a stressor or environmental challenge and is used to describe the relatively stable difference in the behavioral predisposition of an animal, which can be related to psychobiological mechanisms.
這樣可讀性高非常多，來找人裝看看好了...