diff --git a/library/std/src/collections/hash/set.rs b/library/std/src/collections/hash/set.rs
index 19428fe9a2339..fa498a987d6af 100644
--- a/library/std/src/collections/hash/set.rs
+++ b/library/std/src/collections/hash/set.rs
@@ -588,6 +588,12 @@ where
     /// Visits the values representing the intersection,
     /// i.e., the values that are both in `self` and `other`.
     ///
+    /// When an equal element is present in `self` and `other`
+    /// then the resulting `Intersection` may yield references to
+    /// one or the other. This can be relevant if `T` contains fields which
+    /// are not compared by its `Eq` implementation, and may hold different
+    /// value between the two equal copies of `T` in the two sets.
+    ///
     /// # Examples
     ///
     /// ```
diff --git a/src/librustdoc/html/static/.eslintrc.js b/src/librustdoc/html/static/.eslintrc.js
index bd83b254caacb..9088e06e50803 100644
--- a/src/librustdoc/html/static/.eslintrc.js
+++ b/src/librustdoc/html/static/.eslintrc.js
@@ -78,5 +78,11 @@ module.exports = {
         "block-scoped-var": "error",
         "guard-for-in": "error",
         "no-alert": "error",
+        "no-confusing-arrow": "error",
+        "no-div-regex": "error",
+        "no-floating-decimal": "error",
+        "no-implicit-globals": "error",
+        "no-implied-eval": "error",
+        "no-label-var": "error",
     }
 };
diff --git a/src/librustdoc/html/static/js/main.js b/src/librustdoc/html/static/js/main.js
index 548aeedd03384..414bca850e3dc 100644
--- a/src/librustdoc/html/static/js/main.js
+++ b/src/librustdoc/html/static/js/main.js
@@ -882,7 +882,7 @@ function loadCss(cssFileName) {
             ["-", "Collapse all sections"],
         ].map(x => "<dt>" +
             x[0].split(" ")
-                .map((y, index) => (index & 1) === 0 ? "<kbd>" + y + "</kbd>" : " " + y + " ")
+                .map((y, index) => ((index & 1) === 0 ? "<kbd>" + y + "</kbd>" : " " + y + " "))
                 .join("") + "</dt><dd>" + x[1] + "</dd>").join("");
         const div_shortcuts = document.createElement("div");
         addClass(div_shortcuts, "shortcuts");
diff --git a/src/tools/clippy/clippy_lints/src/matches/redundant_pattern_match.rs b/src/tools/clippy/clippy_lints/src/matches/redundant_pattern_match.rs
index 095cd43ea13fb..0ea3f3b673b7d 100644
--- a/src/tools/clippy/clippy_lints/src/matches/redundant_pattern_match.rs
+++ b/src/tools/clippy/clippy_lints/src/matches/redundant_pattern_match.rs
@@ -70,7 +70,7 @@ fn temporaries_need_ordered_drop<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<
                         }
                     }
                 },
-                // the base type is alway taken by reference.
+                // the base type is always taken by reference.
                 // e.g. In `(vec![0])[0]` the vector is a temporary value.
                 ExprKind::Index(base, index) => {
                     if !matches!(base.kind, ExprKind::Path(_)) {