nrip 0.8.9

Safe rm with a graveyard (MVP: rm, ls, prune, resurrect)
Documentation 
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use std::ffi::OsStr;

pub fn set_var<K: AsRef<OsStr>, V: AsRef<OsStr>>(k: K, v: V) {
    unsafe {
        std::env::set_var(k, v);
    }
}

#[allow(dead_code)]
pub fn remove_var<K: AsRef<OsStr>>(k: K) {
    unsafe {
        std::env::remove_var(k);
    }
}