[PSR-4] PseudoNamespaceToNamespaceRector generates invalid php-code

[shyim]

Subject	Details
PHP version	PHP 7.3.7
Full Command	~/Code/rector/bin/rector process --config rector.yaml tests/Functional/

Current Behaviour

Minimal PHP Code Causing Issue

It's this class https://github.com/shopware/shopware/blob/03d3bcb33be7d39a7790124078baab3a0d83ecea/tests/Functional/Controllers/Backend/CategoryTest.php#L38

Following rector config used:

services:
    Rector\Rector\Namespace_\PseudoNamespaceToNamespaceRector:
        $namespacePrefixesWithExcludedClasses:
            Shopware_: {  }

parameters:
    php_version_features: '7.2'
    exclude_paths:
        - 'tests/Functional/bootstrap.php'
    autoload_paths:
        - 'vendor/autoload.php'
        - 'engine/Library/Enlight'
        - 'tests'

Expected Behaviour

Added namespace to be above all uses

[TomasVotruba]

Provide failing test via PR