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Add more example of Enumerable#one? [ci skip]

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61179 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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kazu 2017-12-12 15:01:13 +00:00
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enum.c
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@ -1515,6 +1515,7 @@ rb_nmin_run(VALUE obj, VALUE num, int by, int rev, int ary)
* [ nil, true, 99 ].one? #=> false
* [ nil, true, false ].one? #=> true
* [ nil, true, 99 ].one?(Integer) #=> true
* [].one? #=> false
*
*/
static VALUE