bug #10363 [FrameworkBundle][Console] Fix issue #10345 container:debug --parameter="" not working anymore (FineWolf)

This PR was merged into the 2.4 branch.

Discussion
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[FrameworkBundle][Console] Fix issue #10345 container:debug --parameter="" not working anymore

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes*
| Fixed tickets | #10345
| License       | MIT
| Doc PR        | N/A

## TODO
- [x] Fix issue #10345
- [ ] Create unit test for `describeContainerParameter`

Commits
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b278aa4 Fix issue symfony/symfony#10345 '[FrameworkBundle][Console] container:debug --parameter="" not working anymore'

src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php

@@ -55,7 +55,7 @@ abstract class Descriptor implements DescriptorInterface
                 $this->describeContainerService($this->resolveServiceDefinition($object, $options['id']), $options);
                 break;
             case $object instanceof ContainerBuilder && isset($options['parameter']):
-                $this->formatParameter($object->getParameter($options['parameter']));
+                $this->describeContainerParameter($object->getParameter($options['parameter']), $options);
                 break;
             case $object instanceof ContainerBuilder:
                 $this->describeContainerServices($object, $options);
@@ -114,6 +114,17 @@ abstract class Descriptor implements DescriptorInterface
      */
     abstract protected function describeRoute(Route $route, array $options = array());
 
+    /**
+     * Describes a specific container parameter.
+     *
+     * @param mixed $parameterValue
+     * @param array $options
+     */
+    protected function describeContainerParameter($parameterValue, array $options = array())
+    {
+        $this->write($this->formatParameter($parameterValue));
+    }
+
     /**
      * Describes container parameters.
      *