-h overridable in subcommand but --help is not

[frewsxcv]

Rust Version

rustc 1.23.0-nightly (a35a3abcd 2017-11-10)

Affected Version of clap

2.27.1

Expected Behavior Summary

> target/debug/foo bar -h
> target/debug/foo bar --help
>

Actual Behavior Summary

> target/debug/foo bar -h
> target/debug/foo bar --help
foo-bar 

USAGE:
    foo bar [FLAGS]

FLAGS:
    -h               
        --help       
    -V, --version    Prints version information
>

Sample Code or Link to Sample Code

extern crate clap;

fn main() {
    let _ = clap::App::new("foo")
        .subcommand(
            clap::SubCommand::with_name("bar")
                .arg(clap::Arg::with_name("help1").short("h"))
                .arg(clap::Arg::with_name("help2").long("help"))
        )
        .get_matches();
}

Debug output

gist

[kbknapp]

Thanks for filing this, it should be an easy fix!