fixup! fixup! debugger: fix behavior of plain object exec in debugger repl

move regexes outside of `isObjectLiteral`

Author: dario-piotrowicz

lib/internal/repl/utils.js

@@ -739,6 +739,9 @@ function setupReverseSearch(repl) {
   return { reverseSearch };
 }
 
+const startsWithBraceRegExp = /^\s*{/;
+const endsWithSemicolonRegExp = /;\s*$/;
+
 /**
  * Checks if some provided code represents an object literal.
  * This is helpful to prevent confusing repl code evaluations where
@@ -748,8 +751,8 @@ function setupReverseSearch(repl) {
  * @returns {boolean} true if the code represents an object literal, false otherwise
  */
 function isObjectLiteral(code) {
-  return RegExpPrototypeExec(/^\s*{/, code) !== null &&
-    RegExpPrototypeExec(/;\s*$/, code) === null;
+  return RegExpPrototypeExec(startsWithBraceRegExp, code) !== null &&
+    RegExpPrototypeExec(endsWithSemicolonRegExp, code) === null;
 }
 
 module.exports = {