[ruby/irb] Avoid generating documentation pages for internal

components
(https://github.com/ruby/irb/pull/1047)

https://github.com/ruby/irb/commit/f57025a35e

lib/irb.rb

@@ -879,7 +879,7 @@ require_relative "irb/pager"
 module IRB
 
   # An exception raised by IRB.irb_abort
-  class Abort < Exception;end
+  class Abort < Exception;end # :nodoc:
 
   class << self
     # The current IRB::Context of the session, see IRB.conf

lib/irb/command/base.rb

@@ -5,13 +5,11 @@
 #
 
 module IRB
-  # :stopdoc:
-
   module Command
-    class CommandArgumentError < StandardError; end
+    class CommandArgumentError < StandardError; end # :nodoc:
 
     class << self
-      def extract_ruby_args(*args, **kwargs)
+      def extract_ruby_args(*args, **kwargs) # :nodoc:
         throw :EXTRACT_RUBY_ARGS, [args, kwargs]
       end
     end
@@ -57,8 +55,6 @@ module IRB
       end
     end
 
-    Nop = Base
+    Nop = Base # :nodoc:
   end
-
-  # :startdoc:
 end