docs: function(offset, newline){
      var ast;
      offset = offset || 0;
      newline = newline ? '\n' : '';
      ast = this.buffer(newline + Array(this.indents + offset).join(this.pp));
      if (this.parentIndents) {
  
        push.apply(ast, this.ast_buffer(t.callExpression(
                                  t.memberExpression(t.identifier('pug_indent'), t.identifier('join')),
                                  [t.stringLiteral('')]
                                )));
  
      }
      return ast;
    }