I just noticed that in the Racket Guide Chapter 13 "Classes and Objects" where they discuss interfaces they don't use the convention of ending an interface with <%>, i.e. they have "fish-interface", "grower-interface" ... not "fish-interface<%?" etc. The Racket reference chapter 5 does use the convention of ending with <%> but as far as I can see they don't say it is the convention. I vaguely recall that the convention of ending interfaces with <%> was mentioned (still is?) somewhere in the documentation in the past.
Harry Spier
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