Merge #3220

3220: Fix clippy warnings, update Cargo.toml versions r=matklad a=SomeoneToIgnore

In the `cargo xtask lint` ouptut, there were two interesting Clippy warnings that might be interesting to investigate further:

* warning: this argument (4 byte) is passed by reference, but would be more efficient if passed by value (limit: 8 byte)

* warning: large size difference between variants

Co-authored-by: Kirill Bulatov <[email protected]>

1 files changed, 2 insertions, 4 deletions

diff --git a/crates/ra_parser/src/grammar/expressions/atom.rs b/crates/ra_parser/src/grammar/expressions/atom.rs
index b72d2e9e6..b77b683b5 100644
--- a/crates/ra_parser/src/grammar/expressions/atom.rs
+++ b/crates/ra_parser/src/grammar/expressions/atom.rs
@@ -230,10 +230,8 @@ fn lambda_expr(p: &mut Parser) -> CompletedMarker {
     p.eat(T![async]);
     p.eat(T![move]);
     params::param_list_closure(p);
-    if opt_fn_ret_type(p) {
-        if !p.at(T!['{']) {
-            p.error("expected `{`");
-        }
+    if opt_fn_ret_type(p) && !p.at(T!['{']) {
+        p.error("expected `{`");
     }
 
     if p.at_ts(EXPR_FIRST) {