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+dnl @ ../doc/m4.texi:2587: Origin of test
+dnl @ expected status: 0
+dnl @ extra options:
+dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
+dnl @ Foundation, Inc.
+dnl @ This file is free software; the Free Software Foundation
+dnl @ gives unlimited permission to copy and/or distribute it
+dnl @ with or without modifications, as long as this notice
+dnl @ is preserved.
+pushdef(`define', `hidden')
+dnl @result{}
+undefine(`undefine')
+dnl @result{}
+define(`foo', `bar')
+dnl @result{}hidden
+foo
+dnl @result{}foo
+builtin(`define', `foo', defn(`divnum'))
+dnl @result{}
+foo
+dnl @result{}0
+builtin(`define', `foo', `BAR')
+dnl @result{}
+foo
+dnl @result{}BAR
+undefine(`foo')
+dnl @result{}undefine(foo)
+foo
+dnl @result{}BAR
+builtin(`undefine', `foo')
+dnl @result{}
+foo
+dnl @result{}foo