fnEscapeRegExp = function (sString) {
		return sString.replace(rEscapeRegExp, "\\$&");
	}
Escapes all characters that would have a special meaning in a regular expression.

This method can be used when a string with arbitrary content has to be integrated
into a regular expression and when the whole string should match literally.

@example
sap.ui.require(["sap/base/strings/escapeRegExp"], function(escapeRegExp) {

   var text = "E=m*c^2"; // text to search
   var search = "m*c";   // text to search for

   text.match( new RegExp(              search  ) ); // [ "c" ]
   text.match( new RegExp( escapeRegExp(search) ) ); // [ "m*c" ]

});

@function
@since 1.58
@alias module:sap/base/strings/escapeRegExp
@param {string} sString String to escape
@returns {string} The escaped string
@public
@SecPassthrough {0|return}