apply manual_contains to Clippy sources

Author: lapla-cogito

clippy_lints/src/booleans.rs

@@ -555,7 +555,7 @@ impl<'tcx> NonminimalBoolVisitor<'_, 'tcx> {
                     _ => simplified.push(Bool::Not(Box::new(simple.clone()))),
                 }
                 let simple_negated = simple_negate(simple);
-                if simplified.iter().any(|s| *s == simple_negated) {
+                if simplified.contains(&simple_negated) {
                     continue;
                 }
                 simplified.push(simple_negated);

clippy_lints/src/casts/cast_sign_loss.rs

@@ -142,11 +142,11 @@ fn expr_sign<'cx, 'tcx>(cx: &LateContext<'cx>, mut expr: &'tcx Expr<'tcx>, ty: i
             expr = recv;
         }
 
-        if METHODS_POW.iter().any(|&name| method_name == name)
+        if METHODS_POW.contains(&method_name)
             && let [arg] = args
         {
             return pow_call_result_sign(cx, caller, arg);
-        } else if METHODS_RET_POSITIVE.iter().any(|&name| method_name == name) {
+        } else if METHODS_RET_POSITIVE.contains(&method_name) {
             return Sign::ZeroOrPositive;
         }
     }

clippy_lints/src/size_of_in_element_count.rs

@@ -99,7 +99,7 @@ fn get_pointee_ty_and_count_expr<'tcx>(
     if let ExprKind::MethodCall(method_path, ptr_self, [.., count], _) = expr.kind
         // Find calls to copy_{from,to}{,_nonoverlapping}
         && let method_ident = method_path.ident.as_str()
-        && METHODS.iter().any(|m| *m == method_ident)
+        && METHODS.contains(&method_ident)
 
         // Get the pointee type
         && let ty::RawPtr(pointee_ty, _) =