fix output in EXAMPLES [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53867 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Thu Feb 18 21:32:15 2016  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* man/irb.1: fix output in EXAMPLES.
+
 Thu Feb 18 21:05:47 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* string.c (sym_match_m): delegate to String#match but not

man/irb.1

@@ -143,7 +143,7 @@ Personal irb initialization.
 .Dl irb(main):002:0> Ic def t(x)
 .Dl irb(main):003:1> Ic   x+1
 .Dl irb(main):004:1> Ic end
-.Dl => nil
+.Dl => :t
 .Dl irb(main):005:0> Ic t(3)
 .Dl => 4
 .Dl irb(main):006:0> Ic if t(3) == 4