diff --git a/src/yes/yes.rs b/src/yes/yes.rs
index 5e3364c38..8a265fc06 100644
--- a/src/yes/yes.rs
+++ b/src/yes/yes.rs
@@ -16,6 +16,7 @@ extern crate getopts;
 extern crate libc;
 
 use std::io::print;
+use std::borrow::IntoCow;
 
 #[path = "../common/util.rs"]
 #[macro_use]
@@ -24,7 +25,7 @@ mod util;
 static NAME: &'static str = "yes";
 
 pub fn uumain(args: Vec<String>) -> isize {
-    let program = args[0].clone();
+    let program = &args[0];
     let opts = [
         getopts::optflag("h", "help", "display this help and exit"),
         getopts::optflag("V", "version", "output version information and exit"),
@@ -41,27 +42,24 @@ pub fn uumain(args: Vec<String>) -> isize {
         println!("Usage:");
         println!("  {0} [STRING]... [OPTION]...", program);
         println!("");
-        print(getopts::usage("Repeatedly output a line with all specified STRING(s), or 'y'.", &opts).as_slice());
+        print(&getopts::usage("Repeatedly output a line with all specified STRING(s), or 'y'.", &opts)[]);
         return 0;
     }
     if matches.opt_present("version") {
         println!("yes 1.0.0");
         return 0;
     }
-    let mut string = "y".to_string();
-    if !matches.free.is_empty() {
-        string = matches.free.connect(" ");
-    }
+    let string = if matches.free.is_empty() {
+        "y".into_cow()
+    } else {
+        matches.free.connect(" ").into_cow()
+    };
 
-    exec(string.as_slice());
+    exec(&string[]);
 
     0
 }
 
 pub fn exec(string: &str) {
-    loop {
-        if !pipe_println!("{}", string) {
-            break;
-        }
-    }
+    while pipe_println!("{}", string) { }
 }