Use crate info for clap help text.

helix-term/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 name = "helix-term"
 version = "0.1.0"
+description = "A post-modern text editor."
 authors = ["Blaž Hrastnik <blaz@mxxn.io>"]
 edition = "2018"
 
@@ -21,4 +22,4 @@ num_cpus = "1.13"
 # tui = { version = "0.12", default-features = false, features = ["crossterm"] }
 tui = { git = "https://github.com/fdehau/tui-rs", default-features = false, features = ["crossterm"] }
 crossterm = { version = "0.18", features = ["event-stream"] }
-clap = { version = "3.0.0-beta.2 ", default-features = false, features = ["std"] }
+clap = { version = "3.0.0-beta.2 ", default-features = false, features = ["std", "cargo"] }

helix-term/src/main.rs

@@ -12,9 +12,7 @@ use anyhow::Error;
 static EX: smol::Executor = smol::Executor::new();
 
 fn main() -> Result<(), Error> {
-    let args = App::new("helix")
+    let args = clap::app_from_crate!()
-        .version("0.1")
-        .about("A post-modern text editor.")
         .arg(
             Arg::new("files")
                 .about("Sets the input file to use")