Helper command doesn't place `ago` properly

[joseluis]

from: src/languages/french.rs

assert_eq!(f.convert(Duration::from_secs(60)), "il y a 1 minute");

But running the command:

$ cargo run fr
    Finished dev [unoptimized + debuginfo] target(s) in 0.07s
     Running `(..)/timeago/target/debug/timeago fr`

60
1 minute il y a