Wrong fish completion is generated if the help description of the value has the comma

[sorairolake]

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• I have searched the discussions
• I have searched the open and rejected issues

Rust Version

1.63.0

Clap Version

3.2.18

Minimal reproducible code

use std::io;

use clap::{CommandFactory, Parser, ValueEnum};
use clap_complete::Shell;

#[derive(Parser)]
struct Opt {
    /// Help message.
    #[clap(long, value_enum)]
    arg: Value,
}

#[derive(Clone, ValueEnum)]
pub enum Value {
    /// Alice and Bob.
    Foo,

    /// Carol, a third participant.
    Bar,
}

fn main() {
    clap_complete::generate(Shell::Fish, &mut Opt::command(), "test", &mut io::stdout());
}

Steps to reproduce the bug with the above code

cargo run

Actual Behaviour

The following completions are generated:

complete -c test -l arg -d 'Help message' -r -f -a "{foo        Alice and Bob,bar       Carol, a third participant}"
complete -c test -s h -l help -d 'Print help information'

Expected Behaviour

The comma in the help description should be escaped:

complete -c test -l arg -d 'Help message' -r -f -a "{foo        Alice and Bob,bar       Carol\, a third participant}"
complete -c test -s h -l help -d 'Print help information'

Additional Context

• clap_complete: 3.2.4

Debug Output

No response