use map and join instead of foreach

Author: Willy Hardy

src/plugins/search/search.js

@@ -69,12 +69,9 @@ export function genIndex(path, content = '', router, depth) {
       } else if (index[slug].body) {
         index[slug].body += '\n' + (token.text || '')
       } else if (token.type === 'table'){
-        var tableString = '|';
-        token.cells.forEach(function (rows) {
-          rows.forEach(function(cell) {
-             tableString += ' ' + cell + ' |';
-          });
-        });
+        var tableString = token.cells.map(function (rows) {
+          return rows.join(' | ');
+        }).join(' |\n ');
         index[slug].body = tableString;
       } else {
         index[slug].body = token.text