Since V1.26.0, there is a RegExp BUG in IE10/11

[xjArea]

Information:

• Prism version: V1.26.0+
• Environment: IE10/11 in Windows7/10

Description
V1.25.0 In IE is fine, but Since V1.26.0, IE can't work, the problem is this line :
element.className = element.className.replace(RegExp(lang, 'gi'), '');

Example
Because the type of lang is RexExp, but in IE, RegExp() function, the first parame only can be a String, so it cant't run.
Maybe We can do this to solve it : element.className = element.className.replace(RegExp(String(lang), 'gi'), '');

In addition, the modifier of lang is 'i' : var lang = /(?:^|\s)lang(?:uage)?-([\w-]+)(?=\s|$)/i;,
but here it is changed to 'gi', I am really worried about whether it will cause an error in some case.

[ljharb]

You'd need lang.source, i believe.

[ljharb]

(Also note that if you use the es5-shim/es6-shim, this scenario is handled properly)

[xjArea]

RegExp.prototype.source will return the RegExp text part, no include flags, so is :
element.className = element.className.replace(RegExp(lang.source, 'gi'), '');