style: update some comments

Signed-off-by: inhere <[email protected]>

Author: inhere

src/Concern/ApplicationHelpTrait.php

@@ -35,7 +35,6 @@
 use function str_replace;
 use function strpos;
 use function strtr;
-use function vdump;
 use const PHP_EOL;
 use const PHP_OS;
 use const PHP_VERSION;
@@ -198,7 +197,7 @@ public function showCommandList(): void
             /** @var AbstractHandler $controller */
             $desc    = $controller::getDescription() ?: $placeholder;
             $aliases = $options['aliases'];
-            $extra   = $aliases ? ColorTag::wrap(' [alias: ' . implode(',', $aliases) . ']', 'info') : '';
+            $extra   = $aliases ? ColorTag::wrap(' (alias: ' . implode(',', $aliases) . ')', 'info') : '';
 
             // collect
             $groupArr[$name] = $desc . $extra;

src/Concern/SimpleEventAwareTrait.php

@@ -49,25 +49,25 @@ trait SimpleEventAwareTrait
     /**
      * register a event handler
      *
-     * @param          $event
+     * @param string   $event
      * @param callable $handler
      * @param bool     $once
      */
-    public function on(string $event, callable $handler, $once = false): void
+    public function on(string $event, callable $handler, bool $once = false): void
     {
         if (self::isSupportedEvent($event)) {
             self::$eventHandlers[$event][] = $handler;
 
             if (!isset(self::$events[$event])) {
-                self::$events[$event] = (bool)$once;
+                self::$events[$event] = $once;
             }
         }
     }
 
     /**
      * register a once event handler
      *
-     * @param          $event
+     * @param string   $event
      * @param callable $handler
      */
     public function once(string $event, callable $handler): void
@@ -111,7 +111,7 @@ public function fire(string $event, ...$args): bool
     /**
      * remove event and it's handlers
      *
-     * @param $event
+     * @param string $event
      *
      * @return bool
      */
@@ -127,7 +127,7 @@ public function off(string $event): bool
     }
 
     /**
-     * @param $event
+     * @param string $event
      *
      * @return bool
      */
@@ -137,7 +137,7 @@ public function hasEvent(string $event): bool
     }
 
     /**
-     * @param $event
+     * @param string $event
      *
      * @return bool
      */