fix(help panel): prevent duplicated key displays

CHANGELOG.md

@@ -22,6 +22,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Fixed widgets occasionally not getting Resize events https://github.com/Textualize/textual/pull/5048
 - Fixed tree regression https://github.com/Textualize/textual/pull/5052
 - Fixed glitch with single line inline widget https://github.com/Textualize/textual/pull/5054
+- Fixed duplicated key displays in the help panel https://github.com/Textualize/textual/issues/5037
 
 ## [0.80.1] - 2024-09-24
 

src/textual/widgets/_key_panel.py

@@ -90,9 +90,12 @@ def render_description(binding: Binding) -> Text:
             get_key_display = self.app.get_key_display
             for multi_bindings in action_to_bindings.values():
                 binding, enabled, tooltip = multi_bindings[0]
-                key_display = " ".join(
-                    get_key_display(binding) for binding, _, _ in multi_bindings
-                )
+                if binding.key_display:
+                    key_display = binding.key_display
+                else:
+                    key_display = " ".join(
+                        get_key_display(binding) for binding, _, _ in multi_bindings
+                    )
                 table.add_row(
                     Text(key_display, style=key_style),
                     render_description(binding),