[ruby/reline] Bind yank-pop correctly

https://github.com/ruby/reline/commit/3c74beac65

lib/reline/key_actor/emacs.rb

@@ -307,7 +307,7 @@ class Reline::KeyActor::Emacs < Reline::KeyActor::Base
     # 152 M-^X
     :ed_unassigned,
     # 153 M-^Y
-    :ed_unassigned,
+    :em_yank_pop,
     # 154 M-^Z
     :ed_unassigned,
     # 155 M-^[

lib/reline/line_editor.rb

@@ -1991,6 +1991,7 @@ class Reline::LineEditor
       @byte_pointer += yanked.bytesize
     end
   end
+  alias_method :yank, :em_yank
 
   private def em_yank_pop(key)
     yanked, prev_yank = @kill_ring.yank_pop
@@ -2007,6 +2008,7 @@ class Reline::LineEditor
       @byte_pointer += yanked.bytesize
     end
   end
+  alias_method :yank_pop, :em_yank_pop
 
   private def ed_clear_screen(key)
     @cleared = true

test/reline/test_key_actor_emacs.rb

@@ -2167,6 +2167,24 @@ class Reline::KeyActor::Emacs::Test < Reline::TestCase
     end
   end
 
+  def test_em_yank_pop
+    input_keys("def hoge\C-w\C-b\C-f\C-w", false)
+    assert_byte_pointer_size('')
+    assert_cursor(0)
+    assert_cursor_max(0)
+    assert_line('')
+    input_keys("\C-y", false)
+    assert_byte_pointer_size('def ')
+    assert_cursor(4)
+    assert_cursor_max(4)
+    assert_line('def ')
+    input_keys("\M-\C-y", false)
+    assert_byte_pointer_size('hoge')
+    assert_cursor(4)
+    assert_cursor_max(4)
+    assert_line('hoge')
+  end
+
 =begin # TODO: move KeyStroke instance from Reline to LineEditor
   def test_key_delete
     input_keys('ab')