How to configure grunt-revizor?

Question

Grunt.js

Good evening!
I do everything for mana , but I don’t understand why he does 2 things, not the way he should.
1. Spits out files (-min) in the same folder where they are.
2. Does not compress class names.
html:
<div class="testClassesLong--">long class</div>
css:

.testClassesLong-- {
    color: red;
}

gruntfile:

module.exports = function(grunt) {
  grunt.initConfig({
    revizor: {
      options: {},
      src: ['test/test.html', 'test/test.css'],
      dest: 'build/'
    }
  });
  grunt.loadNpmTasks('grunt-revizor');
  return grunt.registerTask('default', ['revizor']);
};

I don't see any errors or maybe something is missing :(

Answer 1

Specified in an obvious way: namePrefix: '--'
Confusing in mana this line :
Type: String Default value: '--'