Example under _regex_arguments section is different from the explanation for the example itself?

[fishBone000]

zsh-completions/zsh-completions-howto.org

Lines 291 to 299 in d24f58d

	Here is an example:
	#+BEGIN_SRC sh
	_regex_arguments _cmd /$'[^\0]##\0'/ \( /$'word1(a|b|c)\0'/ ':word:first word:(word1a word1b word1c)' '|'\
	/$'word11(a|b|c)\0'/ ':word:first word:(word11a word11b word11c)' \( /$'word2(a|b|c)\0'/ ':word:second word:(word2a word2b word2c)'\
	'|' /$'word22(a|b|c)\0'/ ':word:second word:(word22a word22b word22c)' \) \)
	_cmd "$@"
	#+END_SRC
	in this case the first word can be word1 or word11 followed by an a, b or c, and if the first word contains 11 then a second
	word is allowed which can be word2 followed by and a, b, or c, or a filename.

The explanation for the example and the example itself seems a bit different?

The example seems to say that we should match:

• Any non-empty command
• Any branch below
  • word1(a|b|c)
  • word11(a|b|c)
    • Any branch below
      • word2(a|b|c)
      • word22(a|b|c)

But the explanation says something else, like the second word can be word2(a|b|c) or a filename.