Function write_to 

pub fn write_to<P>(file: Option<P>, content: String) -> WriteResult
where
    P: AsRef<Path>,

Writes content to a file or to stdout.

If file is Some, then use it as a filename to write to. Otherwise, write to the standard output.

If any error is found, return an Err.

Examples

use kripher::utils::write_to;

// Write 'Content' to a file.
match write_to(Some("/tmp/output"), String::from("Content")) {
    Ok(_) => println!("write successfull"),
    Err(_) => println!("Oops!"),
}