Merge documentation from the same class on ri generation.

Fixes bug where documentation could disappear.

Fix typo in lib/rdoc/options.rb

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14923 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 15 insertions, 9 deletions

diff --git a/lib/rdoc/generators/ri_generator.rb b/lib/rdoc/generators/ri_generator.rb
index b248909fa9..edca9938a5 100644
--- a/lib/rdoc/generators/ri_generator.rb
+++ b/lib/rdoc/generators/ri_generator.rb
@@ -28,6 +28,8 @@ class Generators::RIGenerator
     @ri_writer = RI::RiWriter.new(".")
     @markup    = SM::SimpleMarkup.new
     @to_flow   = SM::ToFlow.new
+
+    @generated = {}
   end
 
   ##
@@ -205,17 +207,21 @@ class Generators::RIGenerator
       end
     end
 
-    if old_cls.nil?
-      # no merge: simply overwrite
-      @ri_writer.remove_class(cls_desc)
-      @ri_writer.add_class(cls_desc)
-    else
-      # existing class: merge in
-      old_desc = rdr.get_class(old_cls)
+    prev_cls = @generated[cls_desc.full_name]
+
+    if old_cls and not prev_cls then
+      old_desc = rdr.get_class old_cls
+      cls_desc.merge_in old_desc
+    end
 
-      old_desc.merge_in(cls_desc)
-      @ri_writer.add_class(old_desc)
+    if prev_cls then
+      cls_desc.merge_in prev_cls
     end
+
+    @generated[cls_desc.full_name] = cls_desc
+
+    @ri_writer.remove_class cls_desc
+    @ri_writer.add_class cls_desc
   end
 
 end