tests: improved testability

src/terminal_guard.rs

@@ -11,7 +11,10 @@ pub struct TerminalModeGuard;
 impl TerminalModeGuard {}
 
 impl Drop for TerminalModeGuard {
-    #[allow(clippy::let_underscore_must_use, reason = "We want to ignore errors during cleanup.")]
+    #[allow(
+        clippy::let_underscore_must_use,
+        reason = "We want to ignore errors during cleanup."
+    )]
     fn drop(&mut self) {
         let _ = disable_raw_mode();
         let mut stdout = std::io::stdout();