Add negative choice and parsing tests

Allow negative ranges as long as they aren't reversed too

Allow reversed negative ranges iff both indices are negative

1 files changed, 1 insertions, 0 deletions

diff --git a/src/opt.rs b/src/opt.rs
index 9704d4f..77ba9fd 100644
--- a/src/opt.rs
+++ b/src/opt.rs
@@ -6,6 +6,7 @@ use crate::config::Config;
 
 #[derive(Debug, StructOpt)]
 #[structopt(name = "choose", about = "`choose` sections from each line of files")]
+#[structopt(setting = structopt::clap::AppSettings::AllowLeadingHyphen)]
 pub struct Opt {
     /// Specify field separator other than whitespace
     #[structopt(short, long)]