Use Q for quitting instead of any key

src/main.rs

@@ -511,7 +511,8 @@ fn run() -> Result<(), Error> {
     }
 
     if config.keep_at_end() {
-        print_info("\n(R)eboot\n(S)hell\n\nPress any other key to continue");
+        print_info("\n(R)eboot\n(S)hell\n(Q)uit");
+        loop {
             match get_char() {
                 's' | 'S' => {
                     run_shell();
@@ -519,7 +520,12 @@ fn run() -> Result<(), Error> {
                 'r' | 'R' => {
                     reboot();
                 }
-            _ => (),
+                'q' | 'Q' => (),
+                _ => {
+                    continue;
+                }
+            }
+            break;
         }
     }