Update rubyspec for stringio bug fix

spec/ruby/library/stringio/shared/each.rb

@@ -36,7 +36,8 @@ describe :stringio_each_separator, shared: true do
     seen.should == ["2 1 2 1 2"]
   end
 
-  it "yields each paragraph when passed an empty String as separator" do
+  ruby_version_is ''..."3.2" do
+    it "yields each paragraph with two separation characters when passed an empty String as separator" do
       seen = []
       io = StringIO.new("para1\n\npara2\n\n\npara3")
       io.send(@method, "") {|s| seen << s}
@@ -44,6 +45,16 @@ describe :stringio_each_separator, shared: true do
     end
   end
 
+  ruby_version_is "3.2" do
+    it "yields each paragraph with all separation characters when passed an empty String as separator" do
+      seen = []
+      io = StringIO.new("para1\n\npara2\n\n\npara3")
+      io.send(@method, "") {|s| seen << s}
+      seen.should == ["para1\n\n", "para2\n\n\n", "para3"]
+    end
+  end
+end
+
 describe :stringio_each_no_arguments, shared: true do
   before :each do
     @io = StringIO.new("a b c d e\n1 2 3 4 5")