Escape more items in the sidebar when needed

src/librustdoc/html/render.rs

@@ -3709,9 +3709,10 @@ fn sidebar_assoc_items(it: &clean::Item) -> String {
                     })).and_then(|did| c.impls.get(&did));
                     if let Some(impls) = inner_impl {
                         out.push_str("<a class=\"sidebar-title\" href=\"#deref-methods\">");
-                        out.push_str(&format!("Methods from {:#}&lt;Target={:#}&gt;",
-                                              impl_.inner_impl().trait_.as_ref().unwrap(),
-                                              target));
+                        out.push_str(&format!("Methods from {}&lt;Target={}&gt;",
+                                              Escape(&format!("{:#}",
+                                                     impl_.inner_impl().trait_.as_ref().unwrap())),
+                                              Escape(&format!("{:#}", target))));
                         out.push_str("</a>");
                         let ret = impls.iter()
                                        .filter(|i| i.inner_impl().trait_.is_none())

src/test/rustdoc/escape-deref-methods.rs

@@ -0,0 +1,45 @@
+// Copyright 2017 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"]
+
+use std::ops::{Deref, DerefMut};
+
+#[derive(Debug, Clone)]
+pub struct Title {
+    name: String,
+}
+
+#[derive(Debug, Clone)]
+pub struct TitleList {
+    pub members: Vec<Title>,
+}
+
+impl TitleList {
+    pub fn new() -> Self {
+        TitleList { members: Vec::new() }
+    }
+}
+
+impl Deref for TitleList {
+    type Target = Vec<Title>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.members
+    }
+}
+
+// @has foo/struct.TitleList.html
+// @has - '//*[@class="sidebar-title"]' 'Methods from Deref<Target=Vec<Title>>'
+impl DerefMut for TitleList {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.members
+    }
+}