Fix tests on Windows.

The previous commit a7e876d is not right.

tests/test_bin.rs

@@ -5,7 +5,7 @@ use std::{
 
 fn test_example(name: &str, input: &str, out: &str) {
     #[cfg(target_os = "windows")]
-    let out = out.replace("\n", "\r\n");
+    let out = out.replace("\r\n", "\n");
     let mut child = Command::new("cargo")
         .arg("run")
         .arg("--example")