rollup merge of #20722: alexcrichton/audit-show

Conflicts:
	src/libcollections/vec.rs
	src/libcore/fmt/mod.rs
	src/librustdoc/html/format.rs

diff --cc src/liballoc/arc.rs
Simple merge

diff --cc src/liballoc/boxed.rs
Simple merge

diff --cc src/liballoc/rc.rs
Simple merge

diff --cc src/libcollections/string.rs
Simple merge

diff --cc src/libcollections/vec.rs
Simple merge

diff --cc src/libcore/borrow.rs
Simple merge

diff --cc src/libcore/fmt/mod.rs
Simple merge

diff --cc src/librustdoc/html/format.rs
index c7ec687bc1a56a4ec22682d9b7dac4b3e5e053a9,a818c92241e6983ca40e2e7648ae939a03968ab5..b3cef19e56705123659045b01aab381cfec45c58
--- 1/src/librustdoc/html/format.rs
--- 2/src/librustdoc/html/format.rs
+++ b/src/librustdoc/html/format.rs
@@@ -64,6 -66,24 +66,16 @@@ impl UnsafetySpace 
      }
  }
  
 -//NOTE(stage0): remove impl after snapshot
 -#[cfg(stage0)]
 -impl<'a> fmt::Show for TyParamBounds<'a> {
 -    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 -        fmt::String::fmt(self, f)
 -    }
 -}
 -
+ impl<'a, T: fmt::String> fmt::String for CommaSep<'a, T> {
+     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+         for (i, item) in self.0.iter().enumerate() {
+             if i != 0 { try!(write!(f, ", ")); }
+             try!(write!(f, "{}", item));
+         }
+         Ok(())
+     }
+ }
+ 
  impl<'a> fmt::String for TyParamBounds<'a> {
      fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
          let &TyParamBounds(bounds) = self;

diff --cc src/libstd/path/posix.rs
Simple merge

diff --cc src/libstd/path/windows.rs
Simple merge