repl: remove redundant escape

PR-URL: #26496
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

lib/repl.js

@@ -233,7 +233,7 @@ function REPLServer(prompt,
     var awaitPromise = false;
     var input = code;
 
-    if (/^\s*\{/.test(code) && /\}\s*$/.test(code)) {
+    if (/^\s*{/.test(code) && /}\s*$/.test(code)) {
       // It's confusing for `{ a : 1 }` to be interpreted as a block
       // statement rather than an object literal.  So, we first try
       // to wrap it in parentheses, so that it will be interpreted as