click: zsh completion setup fails with `parse error near 'elif'`

Setup

Install dependencies and activate the environment:
```
poetry install
poetry shell
```

Enable autocompletion for tuple-param:

eval "$(_TUPLE_PARAM_COMPLETE=zsh_source tuple-param)"

zsh: parse error near `elif'

The generated zsh completion script contains elif which causes a parse error in zsh.

Name		Name	Last commit message	Last commit date
Latest commit History 6 Commits
.idea		.idea
tests		tests
tuple_param		tuple_param
README.md		README.md
poetry.lock		poetry.lock
pyproject.toml		pyproject.toml