fix markdown generated from code

src/escape.rs

@@ -31,7 +31,7 @@ pub struct EscapePass;
 /// }
 /// ```
 declare_lint! {
-    pub BOXED_LOCAL, Warn, "using Box<T> where unnecessary"
+    pub BOXED_LOCAL, Warn, "using `Box<T>` where unnecessary"
 }
 
 fn is_non_trait_box(ty: ty::Ty) -> bool {

src/unicode.rs

@@ -40,7 +40,7 @@ declare_lint! {
 declare_lint! {
     pub UNICODE_NOT_NFC, Allow,
     "using a unicode literal not in NFC normal form (see \
-     http://www.unicode.org/reports/tr15/ for further information)"
+     [unicode tr15](http://www.unicode.org/reports/tr15/) for further information)"
 }