Update lib/rdoc/options.rb

Co-authored-by: Colby Swandale <[email protected]>

Author: st0012

Diff for: lib/rdoc/options.rb

@@ -341,7 +341,7 @@ class RDoc::Options
   attr_reader :visibility
 
   ##
-  # The server's port to listen on. `nil` means the server is disabled.
+  # The server's port to listen on. `nil` or `false` means the server is disabled.
 
   attr_reader :server_port