Fix numeric-separator transform (#5968)

packages/babel-plugin-transform-numeric-separator/src/index.js

@@ -1,33 +1,29 @@
 import syntaxNumericSeparator from "babel-plugin-syntax-numeric-separator";
 
 export default function({ types: t }) {
-  function replacer(value) {
-    return value.replace(/_/g, "");
-  }
-
   function replaceNumberArg({ node }) {
     if (node.callee.name !== "Number") {
       return;
     }
+
     const arg = node.arguments[0];
     if (!t.isStringLiteral(arg)) {
       return;
     }
-    arg.value = replacer(arg.value);
-  }
 
-  const CallExpression = replaceNumberArg;
-  const NewExpression = replaceNumberArg;
+    arg.value = arg.value.replace(/_/g, "");
+  }
 
   return {
     inherits: syntaxNumericSeparator,
 
     visitor: {
-      CallExpression,
-      NewExpression,
+      CallExpression: replaceNumberArg,
+      NewExpression: replaceNumberArg,
       NumericLiteral({ node }) {
-        if (node.extra && /_/.test(node.extra.raw)) {
-          node.value = replacer(node.extra.raw);
+        const { extra } = node;
+        if (extra && /_/.test(extra.raw)) {
+          extra.raw = extra.raw.replace(/_/g, "");
         }
       },
     },