librustdoc has been updated

Fixes run build error

Fix test failure

Fix tests' errors

src/test/auxiliary/lint_group_plugin_test.rs

@@ -37,9 +37,9 @@ impl LintPass for Pass {
 
     fn check_item(&mut self, cx: &Context, it: &ast::Item) {
         let name = token::get_ident(it.ident);
-        if name.get() == "lintme" {
+        if &name[] == "lintme" {
             cx.span_lint(TEST_LINT, it.span, "item is named 'lintme'");
-        } else if name.get() == "pleaselintme" {
+        } else if &name[] == "pleaselintme" {
             cx.span_lint(PLEASE_LINT, it.span, "item is named 'pleaselintme'");
         }
     }

src/test/auxiliary/lint_plugin_test.rs

@@ -35,7 +35,7 @@ impl LintPass for Pass {
 
     fn check_item(&mut self, cx: &Context, it: &ast::Item) {
         let name = token::get_ident(it.ident);
-        if name.get() == "lintme" {
+        if &name[] == "lintme" {
             cx.span_lint(TEST_LINT, it.span, "item is named 'lintme'");
         }
     }

src/test/run-pass/issue-15149.rs

@@ -1,3 +1,5 @@
+// no-prefer-dynamic
+
 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.