Enable clippy::to_string_in_format_args (#8732)

This PR enables the
[`clippy::to_string_in_format_args`](https://rust-lang.github.io/rust-clippy/master/index.html#/to_string_in_format_args)
rule and fixes the outstanding violations.

Release Notes:

- N/A

crates/editor/src/movement.rs

@@ -841,7 +841,7 @@ mod tests {
                 surrounding_word(&snapshot, display_points[1]),
                 display_points[0]..display_points[2],
                 "{}",
-                marked_text.to_string()
+                marked_text
             );
         }