Fix url for intra link provided method

src/librustdoc/clean/mod.rs

@@ -1101,7 +1101,13 @@ fn resolve(cx: &DocContext, path_str: &str, is_val: bool) -> Result<(Def, Option
                     let kind = match item.kind {
                         ty::AssociatedKind::Const if is_val => "associatedconstant",
                         ty::AssociatedKind::Type if !is_val => "associatedtype",
-                        ty::AssociatedKind::Method if is_val => "tymethod",
+                        ty::AssociatedKind::Method if is_val => {
+                            if item.defaultness.has_value() {
+                                "method"
+                            } else {
+                                "tymethod"
+                            }
+                        }
                         _ => return Err(())
                     };
 

src/test/rustdoc/default-trait-method-link.rs

@@ -0,0 +1,25 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![crate_name = "foo"]
+
+// @has foo/trait.Foo.html '//a[@href="../foo/trait.Foo.html#tymethod.req"]' 'req'
+// @has foo/trait.Foo.html '//a[@href="../foo/trait.Foo.html#method.prov"]' 'prov'
+
+/// Always make sure to implement [`req`], but you don't have to implement [`prov`].
+///
+/// [`req`]: Foo::req
+/// [`prov`]: Foo::prov
+pub trait Foo {
+    /// Required
+    fn req();
+    /// Provided
+    fn prov() {}
+}