Apply misc clippy suggestions (#1505)

apply misc clippy suggestions

Author: Robbepop

crates/wasmi/src/engine/executor/instrs/select.rs

@@ -5,7 +5,7 @@ use crate::{
     ir::{Const16, Instruction, Reg},
 };
 
-impl<'engine> Executor<'engine> {
+impl Executor<'_> {
     /// Fetches two [`Reg`]s.
     fn fetch_register_2(&self) -> (Reg, Reg) {
         let mut addr: InstructionPtr = self.ip;

crates/wasmi/src/engine/translator/instr_encoder.rs

@@ -820,8 +820,7 @@ impl InstrEncoder {
                         | Instruction::CopySpanNonOverlapping { .. }
                         | Instruction::CopyManyNonOverlapping { .. }
                 ),
-                "a preserve instruction is always a register copy instruction but found: {:?}",
-                preserved,
+                "a preserve instruction is always a register copy instruction but found: {preserved:?}",
             );
         }
         if self.notified_preservation.is_none() {