编写长正则表达式，嵌入式注释会成语吗？

大多数时候，人们只是在评论中提供正则表达式匹配的内容。但是，通过浏览Go源代码，我发现了一个有趣的示例：

// removeRE is the list of patterns to skip over at the beginning of a// message when looking for message text.var removeRE = regexp.MustCompile(`(?m-s)A(` +    // Skip leading "Hello so-and-so," generated by prereview plugin.    `(Hello(.|n)*?nn)` +    // Skip quoted text.    `|((On.*|.* writes|.* wrote):n)` +    `|((>.*n)+)` +    // Skip lines with no letters.    `|(([^A-Za-z]*n)+)` +    // Skip links to comments and file info.    `|(http://prereview.*n([^ ]+:[0-9]+:.*n)?)` +    `|(File .*:n)` +    `)`,)