whole_func_string: function checkWikipedia(brands) {
      Object.keys(brands).forEach(k => {
          ['brand:wikipedia', 'operator:wikipedia'].forEach(t => {
              let wp = brands[k].tags[t];
              if (wp && !/^[a-z_]{2,}:[^_]*$/.test(wp)) {
                  _wrongFormat.push([k, wp, t]);
              }
          });
      });
  }
func_code_string: function checkWikipedia(brands) {
      Object.keys(brands).forEach(k => {
          ['brand:wikipedia', 'operator:wikipedia'].forEach(t => {
              let wp = brands[k].tags[t];
              if (wp && !/^[a-z_]{2,}:[^_]*$/.test(wp)) {
                  _wrongFormat.push([k, wp, t]);
              }
          });
      });
  }
func_documentation_string: Additionally check for wrong formatted Wikipedia values