readline: fix unit tests

Author: jcubic

lib/internal/readline/utils.js

@@ -195,11 +195,11 @@ function* emitKeys(stream) {
  const cmd = StringPrototypeSlice(s, cmdStart);
  let match;
 
- if ((match = RegExpPrototypeExec(/^(?:(\d\d?)(?:;(\d))?[~^$]|(\d{3}~))$/, cmd))) {
- if (match[3]) {
- code += match[3];
+ if ((match = RegExpPrototypeExec(/^(?:(\d\d?)(?:;(\d))?([~^$])|(\d{3}~))$/, cmd))) {
+ if (match[4]) {
+ code += match[4];
  } else {
- code += match[1];
+ code += match[1] + match[3];
  modifier = (match[2] || 1) - 1;
  }
  } else if (