Help switch throws an error

[MatthewCallis]

Simply using the -h switch throws an error:

haml-lint -h
Usage: haml-lint [options] [file1, file2, ...]
    -i, --include-linter linter,...  Specify which linters you want to run
    -x, --exclude-linter linter,...  Specify which linters you don't want to run
    -c, --config config-file         Specify which configuration file you want to use
    -e, --exclude file,...           List of file names to exclude
        --show-linters               Display available linters
    -h, --help                       Display help documentation
    -v, --version                    Display version

uninitialized constant HamlLint::CLI::SysExits
/Users/matthew/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/haml-lint-0.6.0/lib/haml_lint/cli.rb:42:in `act_on_options'
/Users/matthew/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/haml-lint-0.6.0/lib/haml_lint/cli.rb:22:in `run'
/Users/matthew/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/haml-lint-0.6.0/bin/haml-lint:7:in `<top (required)>'
/Users/matthew/.rbenv/versions/2.1.1/bin/haml-lint:23:in `load'
/Users/matthew/.rbenv/versions/2.1.1/bin/haml-lint:23:in `<main>'
Report this bug at https://github.com/causes/haml-lint/issues

But others do not:

haml-lint -v
haml-lint 0.6.0

[sds]

Thanks for the report, @MatthewCallis!

Fixed in fa1c529.