Resolve minor issues based on review

clippy_lints/src/field_reassign_with_default.rs

@@ -11,29 +11,27 @@ declare_clippy_lint! {
     /// **What it does:** Checks for immediate reassignment of fields initialized
     /// with Default::default().
     ///
-    /// **Why is this bad?** Fields should be set using
-    /// T { field: value, ..Default::default() } syntax instead of using a mutable binding.
+    /// **Why is this bad?**It's more idiomatic to use [functional update syntax](https://doc.rust-lang.org/reference/expressions/struct-expr.html#functional-update-syntax).
     ///
-    /// **Known problems:** The lint does not detect calls to Default::default()
-    /// if they are made via another struct implementing the Default trait. If type inference stops
-    /// requiring an explicit type for assignment using Default::default() this lint will not
-    /// trigger for cases where the type is elided.
+    /// **Known problems:** None.
     ///
     /// **Example:**
     /// Bad:
-    /// ```ignore
+    /// ```
+    /// # struct A { i: i32 }
     /// let mut a: A = Default::default();
     /// a.i = 42;
     /// ```
     /// Use instead:
-    /// ```ignore
+    /// ```
+    /// # struct A { i: i32 }
     /// let a = A {
     ///     i: 42,
     ///     .. Default::default()
     /// };
     /// ```
     pub FIELD_REASSIGN_WITH_DEFAULT,
-    pedantic,
+    style,
     "binding initialized with Default should have its fields set in the initializer"
 }
 
@@ -56,7 +54,7 @@ impl LateLintPass<'_> for FieldReassignWithDefault {
                     // only when assigning `... = Default::default()`
                     if let Some(ref expr) = local.init;
                     if let ExprKind::Call(ref fn_expr, _) = &expr.kind;
-                    if let ExprKind::Path( qpath ) = &fn_expr.kind;
+                    if let ExprKind::Path(qpath) = &fn_expr.kind;
                     if let Res::Def(_, def_id) = qpath_res(cx, qpath, fn_expr.hir_id);
                     // right hand side of assignment is `Default::default`
                     if match_def_path(cx, def_id, &paths::DEFAULT_TRAIT_METHOD);