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Why does this page
http://reboltutorial.com/cgi-bin/designpatterns-quiz.cgi
shows a ? in the sentence (at least on my firefox)
Separates an object’s abstraction from its implementation
whereas I am using utf-8 ?
Because the site declares UTF-8 as its content type, but the
´is a ISO-8859-1 encoded character. Switch your editor to UTF-8 and type it in again (this is the recommended way over using entities).