added maintainer

Author: hsbt

rdoc.gemspec

@@ -15,15 +15,16 @@ Gem::Specification.new do |s|
     "Dave Thomas",
     "Phil Hagelberg",
     "Tony Strauss",
-    "Zachary Scott"
+    "Zachary Scott",
+    "Hiroshi SHIBATA"
   ]
 
   s.description = <<-DESCRIPTION
 RDoc produces HTML and command-line documentation for Ruby projects.
 RDoc includes the +rdoc+ and +ri+ tools for generating and displaying documentation from the command-line.
   DESCRIPTION
 
-  s.email = ["[email protected]", "[email protected]"]
+  s.email = ["[email protected]", "[email protected]", "[email protected]"]
 
   s.executables = ["rdoc", "ri"]