repl:Do not consider ... as a REPL command

This fix makes ... in REPL to be considered as a javascript construct
rather than a REPL keyword

Fixes: nodejs#14426

Author: shivanth

lib/repl.js

@@ -419,7 +419,7 @@ function REPLServer(prompt,
     // Check to see if a REPL keyword was used. If it returns true,
     // display next prompt and return.
     if (trimmedCmd) {
-      if (trimmedCmd.charAt(0) === '.' && isNaN(parseFloat(trimmedCmd))) {
+      if (trimmedCmd.charAt(0) === '.' && trimmedCmd.charAt(1) != '.' && isNaN(parseFloat(trimmedCmd))) {
         const matches = trimmedCmd.match(/^\.([^\s]+)\s*(.*)$/);
         const keyword = matches && matches[1];
         const rest = matches && matches[2];