chore: fix some minor issues in the comments (#1666)

Signed-off-by: juejinyuxitu <[email protected]>

Author: juejinyuxitu

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

@@ -908,7 +908,7 @@ impl UpdateBranchOffset for Op {
             }
         };
         if offset.init(new_offset).is_err() {
-            // Case: we need to covert `self` into its cmp+branch fallback instruction variant
+            // Case: we need to convert `self` into its cmp+branch fallback instruction variant
             //       since adjusting the 16-bit offset failed.
             let Some(fallback) = self.try_into_cmp_branch_fallback_instr(new_offset, stack)? else {
                 unreachable!("failed to create cmp+branch fallback instruction for: {self:?}");

crates/wasmi/src/engine/translator/func/stack/locals.rs

@@ -3,10 +3,10 @@ use crate::{engine::translator::func::LocalIdx, Error};
 use alloc::vec::Vec;
 use core::iter;
 
-/// Store the index of the first occurence on the stack for every local variable.
+/// Store the index of the first occurrence on the stack for every local variable.
 #[derive(Debug, Default)]
 pub struct LocalsHead {
-    /// The index of the first occurence of every local variable.
+    /// The index of the first occurrence of every local variable.
     first_operands: Vec<Option<OperandIdx>>,
 }
 

crates/wasmi/src/engine/translator/func/stack/operand.rs

@@ -146,7 +146,7 @@ impl TempOperand {
         self.ty
     }
 
-    /// Returns the instruction whcih created this [`TempOperand`] as its result if any.
+    /// Returns the instruction which created this [`TempOperand`] as its result if any.
     pub fn instr(&self) -> Option<Instr> {
         self.instr
     }