@szepeviktor Can you update the appropriate tests please?

@szepeviktor Looks like the build is still failing.

OK. Running home-travis :)

This is not me :(
See the spaces: https://github.com/wp-cli/wp-cli/blob/master/features/core-config.feature#L35-L38
And the origin without spaces: https://github.com/wp-cli/wp-cli/blob/master/templates/wp-config.mustache#L62

It has something to do with WP version < 4.0

Summary

Up to this PR the WPLANG test ran on WP < 4.0 also. That is not good. But it did not fail because of spaces.

I suggest to remove And the wp-config.php file should not contain: and add a new scenario:

@require-wp-4.0
Scenario: No wp-config.php and WPLANG
  Given a wp-config-extra.php file:
    """
    define( 'WP_DEBUG_LOG', true );
    """
  When I run `wp core config {CORE_CONFIG_SETTINGS} --extra-php < wp-config-extra.php`
  Then the wp-config.php file should not contain:
    """
    define( 'WPLANG', '' );
    """