Fix invalid doc (#181)

Author: theofidry

src/Input/ChildCommandFactory.php

@@ -59,7 +59,7 @@ public function createChildCommand(InputInterface $input): array
     }
 
     /**
-     * @return list<string>
+     * @return array<int, string>
      */
     private function createBaseCommand(
         InputInterface $input

tests/Input/ChildCommandFactoryTest.php

@@ -270,6 +270,27 @@ public static function childProvider(): iterable
                 ],
             ];
         })();
+
+        yield 'no PHP executable or command' => (static function () use (
+            $scriptPath
+        ) {
+            [$input, $commandDefinition] = self::createInput(
+                [],
+                [],
+            );
+
+            return [
+                '',
+                $scriptPath,
+                '',
+                $commandDefinition,
+                $input,
+                [
+                    $scriptPath,
+                    '--child',
+                ],
+            ];
+        })();
     }
 
     public function test_it_cannot_create_a_factory_with_an_invalid_script_path(): void