print = (str) => {
    if (!this.codingSystemUtf8_ && this[this.GL].GL) {
      str = this[this.GL].GL(str);
    }

    this.terminal.print(str);
  }
The default parse function.

This will scan the string for the first 1-byte control character (C0/C1
characters from [CTRL]).  Any plain text coming before the code will be
printed to the terminal, then the control character will be dispatched.

@param {!hterm.VT.ParseState} parseState The current parse state.