Don't prepend deriving-generated attributes with _

src/libsyntax_ext/deriving/cmp/partial_eq.rs

@@ -71,7 +71,7 @@ pub fn expand_deriving_partial_eq(cx: &mut ExtCtxt,
                 name: $name,
                 generics: LifetimeBounds::empty(),
                 explicit_self: borrowed_explicit_self(),
-                args: vec![(borrowed_self(), "_other")],
+                args: vec![(borrowed_self(), "other")],
                 ret_ty: Literal(path_local!(bool)),
                 attributes: attrs,
                 is_unsafe: false,

src/libsyntax_ext/deriving/debug.rs

@@ -40,7 +40,7 @@ pub fn expand_deriving_debug(cx: &mut ExtCtxt,
                           name: "fmt",
                           generics: LifetimeBounds::empty(),
                           explicit_self: borrowed_explicit_self(),
-                          args: vec![(fmtr, "_f")],
+                          args: vec![(fmtr, "f")],
                           ret_ty: Literal(path_std!(cx, fmt::Result)),
                           attributes: Vec::new(),
                           is_unsafe: false,

src/libsyntax_ext/deriving/hash.rs

@@ -45,7 +45,7 @@ pub fn expand_deriving_hash(cx: &mut ExtCtxt,
                           },
                           explicit_self: borrowed_explicit_self(),
                           args: vec![(Ptr(Box::new(Literal(arg)),
-                                         Borrowed(None, Mutability::Mutable)), "_state")],
+                                         Borrowed(None, Mutability::Mutable)), "state")],
                           ret_ty: nil_ty(),
                           attributes: vec![],
                           is_unsafe: false,