Auto merge of rust-lang#2994 - RalfJung:rustup, r=RalfJung

Rustup

Author: bors

clippy_lints/src/doc.rs

@@ -729,7 +729,7 @@ fn check_code(cx: &LateContext<'_>, text: &str, edition: Edition, span: Span) {
                     false,
                     TerminalUrl::No,
                 );
-                let handler = Handler::with_emitter(false, None, Box::new(emitter), None);
+                let handler = Handler::with_emitter(Box::new(emitter)).disable_warnings();
                 let sess = ParseSess::with_span_handler(handler, sm);
 
                 let mut parser = match maybe_new_parser_from_source_str(&sess, filename, code) {

clippy_lints/src/methods/bytecount.rs

@@ -45,7 +45,7 @@ pub(super) fn check<'tcx>(
             let haystack = if let ExprKind::MethodCall(path, receiver, [], _) =
                     filter_recv.kind {
                 let p = path.ident.name;
-                if p == sym::iter || p == sym!(iter_mut) {
+                if p == sym::iter || p == sym::iter_mut {
                     receiver
                 } else {
                     filter_recv