Minification steps in assets/fonts leading to error #977

@font-face {
    font-family:Fantastica;
    src:url(../assets/fonts/fantastica.ttf) format('truetype');
    font-weight:400;
    font-style:normal
}

rev: {
      dist: {
        files: {
          src: [
            '<%= yeoman.dist %>/public/{,*/}*.js',
            '<%= yeoman.dist %>/public/{,*/}*.css',
            '<%= yeoman.dist %>/public/assets/images/{,*/}*.{png,jpg,jpeg,gif,webp,svg}',
            '<%= yeoman.dist %>/public/assets/fonts/*'
          ]
        }
      }
  },