auto merge of #7015 : huonw/rust/each-fn-kill, r=thestinger

Continuation of #6995/#6999.

Author: bors

doc/tutorial-tasks.md

@@ -351,10 +351,11 @@ a single large vector of floats. Each task needs the full vector to perform its
 # use std::vec;
 # use std::uint;
 # use std::rand;
+# use std::iterator::IteratorUtil;
 use extra::arc::ARC;
 
 fn pnorm(nums: &~[float], p: uint) -> float {
-    (vec::foldl(0.0, *nums, |a,b| a+(*b).pow(p as float) )).pow(1f / (p as float))
+    nums.iter().fold(0.0, |a,b| a+(*b).pow(p as float) ).pow(1f / (p as float))
 }
 
 fn main() {

src/compiletest/procsrv.rs

@@ -10,14 +10,9 @@
 
 use core::prelude::*;
 
-use core::comm;
-use core::io;
-use core::libc::c_int;
 use core::os;
 use core::run;
 use core::str;
-use core::task;
-use core::vec;
 
 #[cfg(target_os = "win32")]
 fn target_env(lib_path: &str, prog: &str) -> ~[(~str,~str)] {
@@ -74,4 +69,3 @@ pub fn run(lib_path: &str,
         err: str::from_bytes(output.error)
     }
 }
-