Remove ! from todo!() in comments (#8643)

This practice makes it difficult to locate todo!s in my code when I'm
working. Let's take out the bang if we want to keep doing this.

Release Notes:

- N/A

crates/editor/src/hover_popover.rs

@@ -117,7 +117,7 @@ pub fn hover_at_inlay(editor: &mut Editor, inlay_hover: InlayHover, cx: &mut Vie
                     // Highlight the selected symbol using a background highlight
                     this.highlight_inlay_background::<HoverState>(
                         vec![inlay_hover.range],
-                        |theme| theme.element_hover, // todo!("use a proper background here")
+                        |theme| theme.element_hover, // todo("use a proper background here")
                         cx,
                     );
                     this.hover_state.info_popover = Some(hover_popover);
@@ -332,7 +332,7 @@ fn show_hover(
                     // Highlight the selected symbol using a background highlight
                     this.highlight_background::<HoverState>(
                         vec![symbol_range],
-                        |theme| theme.element_hover, // todo! update theme
+                        |theme| theme.element_hover, // todo update theme
                         cx,
                     );
                 } else {