================================================================================
Foreach
================================================================================

foreach a {1 2 3 4 5} {
    put $i
}

--------------------------------------------------------------------------------

(source_file
  (foreach
    (arguments
      (simple_word))
    (braced_word_simple
      (simple_word)
      (simple_word)
      (simple_word)
      (simple_word)
      (simple_word))
    (braced_word
      (command
        (simple_word)
        (word_list
          (variable_substitution
            (id)))))))
