Auto merge of #22561 - richo:as_slice-as_str, r=Manishearth

This may not be quite ready to go out, I fixed some docs but suspect I missed a bunch.

I also wound up fixing a bunch of redundant `[]` suffixes, but on closer inspection I don't believe that can land until after a snapshot.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 425c517cb29..c3bac0cf57c 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -403,11 +403,11 @@ impl<'a> Context<'a> {
                                for the compiler");
         } else {
             self.gate_feature("custom_attribute", attr.span,
-                       format!("The attribute `{}` is currently \
+                       &format!("The attribute `{}` is currently \
                                 unknown to the the compiler and \
                                 may have meaning \
                                 added to it in the future",
-                                name).as_slice());
+                                name));
         }
     }
 }