Update src/librustdoc/clean/types.rs

Co-authored-by: Guillaume Gomez <guillaume1.gomez@gmail.com>

src/librustdoc/clean/types.rs

@@ -1478,7 +1478,7 @@ impl Type {
     }
 
     /// Check if two types are "potentially the same".
-    /// This is different from Eq, because it knows that things like
+    /// This is different from `Eq`, because it knows that things like
     /// `Placeholder` are possible matches for everything.
     crate fn is_same(&self, other: &Self, cache: &Cache) -> bool {
         match (self, other) {