improved code

Author: oscarotero

src/Comments.php

@@ -48,7 +48,7 @@ public function delete(string ...$comments): self
         foreach ($comments as $comment) {
             $key = array_search($comment, $this->comments);
 
-            if ($key !== false) {
+            if (is_int($key)) {
                 array_splice($this->comments, $key, 1);
             }
         }

src/Flags.php

@@ -50,7 +50,7 @@ public function delete(string ...$flags): self
         foreach ($flags as $flag) {
             $key = array_search($flag, $this->flags);
 
-            if ($key !== false) {
+            if (is_int($key)) {
                 array_splice($this->flags, $key, 1);
             }
         }