tweak variable names for exponent fix

Author: shellscape

lib/tokenize.js

@@ -320,14 +320,14 @@ module.exports = function tokenize (input, options) {
 
           // Exponential number notation with minus or plus: 1e-10, 1e+10
           if (regex === wordEndNum || code === period) {
-            let ncode1 = css.charCodeAt(next),
-              ncode2 = css.charCodeAt(next + 1),
-              ncode3 = css.charCodeAt(next + 2);
+            let ncode = css.charCodeAt(next),
+              ncode1 = css.charCodeAt(next + 1),
+              ncode2 = css.charCodeAt(next + 2);
 
             if (
-              (ncode1 === lowerE || ncode1 === upperE) &&
-              (ncode2 === minus || ncode2 === plus) &&
-              (ncode3 >= digit0 && ncode3 <= digit9)
+              (ncode === lowerE || ncode === upperE) &&
+              (ncode1 === minus || ncode1 === plus) &&
+              (ncode2 >= digit0 && ncode2 <= digit9)
             ) {
               wordEndNum.lastIndex = next + 2;
               wordEndNum.test(css);