fix: unescaped chars appearing in zsh completion script

[clifton]

• tests pass, but zsh generated is invalid.
• fixed

> my_app <tab>
_my_app:40: parse error near `;;'

invalid zsh (see line: ::file -- some input's file:_files'):

    local context curcontext="$curcontext" state line
    _arguments "${_arguments_options[@]}" \
'-h[Print help information]' \
'--help[Print help information]' \
'-V[Print version information]' \
'--version[Print version information]' \
'::file -- some input's file:_files' \
":: :_myapp_commands" \
"*::: :->myapp" \
&& ret=0
    case $state in
    (myapp)
        words=($line[2] "${words[@]}")
        (( CURRENT += 1 ))
        curcontext="${curcontext%:*:*}:myapp-command-$line[2]:"
        case $line[2] in
            (test)
_arguments "${_arguments_options[@]}" \
'--case=[test'\''s cases to test]: : ' \
'-h[Print help information]' \
'--help[Print help information]' \
'-V[Print version information]' \
'--version[Print version information]' \

[epage]

Thanks!

[epage]

v3.0.4 is released.