text: #!/usr/bin/env zsh
  # -------------------------------------------------------------------------------------------------
  # Copyright (c) YYYY zsh-syntax-highlighting contributors
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without modification, are permitted
  # provided that the following conditions are met:
  #
  #  * Redistributions of source code must retain the above copyright notice, this list of conditions
  #    and the following disclaimer.
  #  * Redistributions in binary form must reproduce the above copyright notice, this list of
  #    conditions and the following disclaimer in the documentation and/or other materials provided
  #    with the distribution.
  #  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
  #    may be used to endorse or promote products derived from this software without specific prior
  #    written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
  # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
  # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  # -------------------------------------------------------------------------------------------------
  # -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
  # vim: ft=zsh sw=2 ts=2 et
  # -------------------------------------------------------------------------------------------------
  
  alias a=: ls='ls -l'
  BUFFER='"a" foo; \ls'
  
  expected_region_highlight=(
    '1 3 unknown-token' # "a"
    '5 7 default' # foo
    '8 8 commandseparator' # ;
    '10 12 command' # \ls
  )
  