roots/grunt-wp-version — pull request #3 by windyjonas (2014-01-27 08:52:47+00:00)
Title: Allow WordPress coding standard spacing rules.

When you use space after opening paranthesis and before closing parantheis, grunt-wp-version won't recognize the css or js enqueue patterns.
Example:
wp_enqueue_style( 'soi_main', get_template_directory_uri() . '/assets/css/main.min.css', false, 'ba7fc9da018edbd7b9f34232ff3790a3' );

A small change to the regular expressions is necessary to improve this behaviour.