  visitMixinBlock: function(block) {
    if (this.pp)
      this.buf.push(
        'pug_indent.push(' +
          stringify(Array(this.indents + 1).join(this.pp)) +
          ');'
      );
    this.buf.push('block && block();');
    if (this.pp) this.buf.push('pug_indent.pop();');
  },
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.