Rollup merge of rust-lang#40587 - GuillaumeGomez:rustdoc-const-display, r=frewsxcv

Fix invalid debug display for associated consts

Fixes rust-lang#40568.

r? @rust-lang/docs

cc @SergioBenitez

Author: frewsxcv

src/librustdoc/clean/mod.rs

@@ -2241,11 +2241,11 @@ pub enum PathParameters {
     AngleBracketed {
         lifetimes: Vec<Lifetime>,
         types: Vec<Type>,
-        bindings: Vec<TypeBinding>
+        bindings: Vec<TypeBinding>,
     },
     Parenthesized {
         inputs: Vec<Type>,
-        output: Option<Type>
+        output: Option<Type>,
     }
 }
 
@@ -2260,14 +2260,14 @@ impl Clean<PathParameters> for hir::PathParameters {
                         data.lifetimes.clean(cx)
                     },
                     types: data.types.clean(cx),
-                    bindings: data.bindings.clean(cx)
+                    bindings: data.bindings.clean(cx),
                 }
             }
 
             hir::ParenthesizedParameters(ref data) => {
                 PathParameters::Parenthesized {
                     inputs: data.inputs.clean(cx),
-                    output: data.output.clean(cx)
+                    output: data.output.clean(cx),
                 }
             }
         }

src/librustdoc/html/format.rs

@@ -481,7 +481,7 @@ fn resolved_path(w: &mut fmt::Formatter, did: DefId, path: &clean::Path,
         if is_not_debug {
             write!(w, "{:#}{:#}", HRef::new(did, &last.name), last.params)?;
         } else {
-            write!(w, "{:?}{:?}", HRef::new(did, &last.name), last.params)?;
+            write!(w, "{:?}{}", HRef::new(did, &last.name), last.params)?;
         }
     } else {
         if is_not_debug {
@@ -507,7 +507,7 @@ fn resolved_path(w: &mut fmt::Formatter, did: DefId, path: &clean::Path,
             } else {
                 format!("{:?}", HRef::new(did, &last.name))
             };
-            write!(w, "{}{:?}", path, last.params)?;
+            write!(w, "{}{}", path, last.params)?;
         }
     }
     Ok(())

src/test/rustdoc/const-doc.rs

@@ -0,0 +1,31 @@
+// 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.
+
+#![feature(associated_consts)]
+
+use std::marker::PhantomData;
+
+pub struct Foo<'a> {
+    f: PhantomData<&'a u32>,
+}
+
+pub struct ContentType {
+    pub ttype: Foo<'static>,
+    pub subtype: Foo<'static>,
+    pub params: Option<Foo<'static>>,
+}
+
+impl ContentType {
+    // @has const_doc/struct.ContentType.html
+    // @has  - '//*[@class="docblock"]' 'Any: ContentType = ContentType{ttype: Foo{f: '
+    pub const Any: ContentType = ContentType { ttype: Foo { f: PhantomData, },
+                                               subtype: Foo { f: PhantomData, },
+                                               params: None, };
+}