Use variable assignment

Author: kgryte

lib/node_modules/@stdlib/regexp/native-function/lib/regexp.js

@@ -1,20 +1,28 @@
 'use strict';
 
-var re = '';
+// MAIN //
+
+var str;
+var re;
+
+str = '';
 
 // Use a native function as a template:
-re += Function.prototype.toString.call( Function );
+str += Function.prototype.toString.call( Function );
 
 // Escape special RegExp characters:
-re = re.replace( /([.*+?^=!:$(){}|[\]\/\\])/g, '\\$1' ); // eslint-disable-line no-useless-escape
+str = str.replace( /([.*+?^=!:$(){}|[\]\/\\])/g, '\\$1' ); // eslint-disable-line no-useless-escape
 
 // Replace any mentions of `Function` to make template generic and replace `for ...` and additional info provided in other environments, such as Rhino.
-re = re.replace( /Function|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?' );
+str = str.replace( /Function|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?' );
 
 // Bracket the regular expression:
-re = '^' + re + '$';
+str = '^' + str + '$';
+
+// Create the regular expression:
+re = new RegExp( str );
 
 
 // EXPORTS //
 
-module.exports = new RegExp( re );
+module.exports = re;