pegdown 是一个纯java库，用来对Markdown的清理和轻量加工。它实现了基于 parboiled PEG解析的实现，因此是理解它是很容易的，也很容易扩展。-pegdown is a pure java library is used to the Markdown cleanup and lightweight processing. It parboiled PEG parsing-based implementations, and therefore understand th