KindEditor 4.1.11：
kindeditor-all.js 文件中大致第752行：
/(\s*)<(\/)?([\w\-:]+)((?:\s+|(?:\s+[\w\-:]+)|(?:\s+[\w\-:]+=[^\s"'<>]+)|(?:\s+[\w\-:"]+="[^"]*")|(?:\s+[\w\-:"]+='[^']*'))*)(\/)?>(\s*)/g;
kindeditor-all-min.js 文件中通过/(\s*)搜索：
var h=/(\s*)<(\/)?([\w\-:]+)((?:\s+|(?:\s+[\w\-:]+)|(?:\s+[\w\-:]+=[^\s"'<>]+)|(?:\s+[\w\-:"]+="[^"]*")|(?:\s+[\w\-:"]+='[^']*'))*)(\/)?>(\s*)/g
赋值的正则表达式替换为：
/([\f\n\r\t\v]*)<(\/)?([\w\-:]+)((?:\s+|(?:\s+[\w\-:]+)|(?:\s+[\w\-:]+=[^\s"'<>]+)|(?:\s+[\w\-:"]+="[^"]*")|(?:\s+[\w\-:"]+='[^']*'))*)(\/)?>([ \f\n\r\t\v]*)/g
简单来说，就是把第一个和最后一个 \s 替换成 [ \f\n\r\t\v]
KindEditor 4.1.10：
kindeditor.js 文件的第754行：
var re = /(\s*)<(\/)?([\w\-:]+)((?:\s+|(?:\s+[\w\-:]+)|(?:\s+[\w\-:]+=[^\s"'<>]+)|(?:\s+[\w\-:"]+="[^"]*")|(?:\s+[\w\-:"]+='[^']*'))*)(\/)?>(\s*)/g;
改为
var re = /([ \f\n\r\t\v]*)<(\/)?([\w\-:]+)((?:\s+|(?:\s+[\w\-:]+)|(?:\s+[\w\-:]+=[^\s"'<>]+)|(?:\s+[\w\-:"]+="[^"]*")|(?:\s+[\w\-:"]+='[^']*'))*)(\/)?>([ \f\n\r\t\v]*)/g;