[ruby/reline] Clear dialog when just_move_cursor is called with dialog at last line

https://github.com/ruby/reline/commit/05024b968e

lib/reline/line_editor.rb

@@ -470,8 +470,12 @@ class Reline::LineEditor
       @add_newline_to_end_of_buffer = false
     else
       if @just_cursor_moving and not @rerender_all
+        @dialogs.each do |dialog|
+          clear_each_dialog(dialog)
+          dialog.contents = nil
+          dialog.trap_key = nil
+        end
         rendered = just_move_cursor
-        render_dialog((prompt_width + @cursor) % @screen_size.last)
         @just_cursor_moving = false
         return
       elsif @previous_line_index or new_highest_in_this != @highest_in_this

test/reline/yamatanooroti/test_rendering.rb

@@ -1254,6 +1254,23 @@ begin
       EOC
     end
 
+    def test_clear_dialog_when_just_move_cursor_at_last_line
+      start_terminal(10, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --autocomplete}, startup_message: 'Multiline REPL.')
+      write("class A\n  3\nend\n")
+      write("\C-p\C-p\C-p\C-e\C-hS")
+      write("\C-n")
+      write("1")
+      close
+      assert_screen(<<~'EOC')
+        prompt>   3
+        prompt> end
+        => 3
+        prompt> class S
+        prompt>   31
+        prompt> end
+      EOC
+    end
+
     def write_inputrc(content)
       File.open(@inputrc_file, 'w') do |f|
         f.write content