error-code 3.0.0-beta.5

Error code
Documentation 
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# error-code

[![Crates.io](https://img.shields.io/crates/v/error-code.svg)](https://crates.io/crates/error-code)
[![Documentation](https://docs.rs/error-code/badge.svg)](https://docs.rs/crate/error-code/)
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Error code

## Usage

```rust
use error_code::ErrorCode;

use std::fs::File;

File::open("non_existing");
println!("{}", ErrorCode::last_system());
```