make emacs happy (spaces as indents)

does anyone know how to detect this from the style used in the file?
it's kind of annoying...

rust/solve/src/main.rs

@@ -16,17 +16,17 @@ use std::io::Read;
use solve::cnf;
fn main() {
	let input: &mut String = &mut String::new();
	match io::stdin().read_to_string(input) {
		Ok(_) => match cnf::parse_dimac(input) {
			Ok(cnf) => {
				println!("cnf has {} variables and {} clauses", cnf.num_vars, cnf.num_clauses);
				for clause in cnf.clauses {
					println!("{:?}", clause);
				}
			}
			Err(e) => { println!("Error: {}", e) }
		},
			Err(e) => { println!("Error: {}", e) }
	}
    let input: &mut String = &mut String::new();
    match io::stdin().read_to_string(input) {
	Ok(_) => match cnf::parse_dimac(input) {
	    Ok(cnf) => {
		println!("cnf has {} variables and {} clauses", cnf.num_vars, cnf.num_clauses);
		for clause in cnf.clauses {
		    println!("{:?}", clause);
		}
	    }
	    Err(e) => { println!("Error: {}", e) }
	},
	Err(e) => { println!("Error: {}", e) }
    }
}