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, 2 deletions

diff --git a/crates/ra_parser/src/parser.rs b/crates/ra_parser/src/parser.rs
index 1071c46dc..76e2d4f7d 100644
--- a/crates/ra_parser/src/parser.rs
+++ b/crates/ra_parser/src/parser.rs
@@ -126,13 +126,13 @@ impl<'t> Parser<'t> {
     }
 
     fn at_composite2(&self, n: usize, k1: SyntaxKind, k2: SyntaxKind) -> bool {
-        let t1 = self.token_source.lookahead_nth(n + 0);
+        let t1 = self.token_source.lookahead_nth(n);
         let t2 = self.token_source.lookahead_nth(n + 1);
         t1.kind == k1 && t1.is_jointed_to_next && t2.kind == k2
     }
 
     fn at_composite3(&self, n: usize, k1: SyntaxKind, k2: SyntaxKind, k3: SyntaxKind) -> bool {
-        let t1 = self.token_source.lookahead_nth(n + 0);
+        let t1 = self.token_source.lookahead_nth(n);
         let t2 = self.token_source.lookahead_nth(n + 1);
         let t3 = self.token_source.lookahead_nth(n + 2);
         (t1.kind == k1 && t1.is_jointed_to_next)