Setting Option::FILE_EXTENSIONS does not preserve .php suffix

[mglaman]

Bug Report

Subject	Details
Rector version	Rector dev-main@{no ref
Installed as	Project dependency

In palantirnet/drupal-rector#134 we are upgrading to Rector 0.10. We add the Drupal-specific file extensions, however, it turned out nothing was being processed. We set the file extensions without including .php and it turns out, this caused nothing to process.

Minimal PHP Code Causing Issue

Configuration

    $parameters->set(Option::FILE_EXTENSIONS, [
      'module',
      'theme',
      'install',
      'profile',
      'inc',
      'engine'
    ]);

Expected Behaviour

While adding custom file extensions, I would expect .php to still be analyzed.

[TomasVotruba]

Hi,

the 'php' must be in file exensions explicitly. Any other behavior would be too magical and impossible to exclude.