chore: remove duplicate word in comment (#10614)

Signed-off-by: wangcundashang <wangcundashang@qq.com>

Author: wangcundashang

cranelift/codegen/src/isa/s390x/inst/args.rs

@@ -89,7 +89,7 @@ impl MemArg {
         }
     }
 
-    /// Memory reference using the sum of a register an an offset as address.
+    /// Memory reference using the sum of a register an offset as address.
     pub fn reg_plus_off(reg: Reg, off: i64, flags: MemFlags) -> MemArg {
         MemArg::RegOffset { reg, off, flags }
     }

crates/wasmtime/src/config.rs

@@ -379,7 +379,7 @@ impl Config {
     /// arbitrarily long in the worst case, likely blocking all other
     /// asynchronous tasks.
     ///
-    /// To remedy this situation you have a a few possible ways to solve this:
+    /// To remedy this situation you have a few possible ways to solve this:
     ///
     /// * The most efficient solution is to enable
     ///   [`Config::epoch_interruption`] in conjunction with

crates/wasmtime/src/runtime/vm/vmcontext.rs

@@ -1034,7 +1034,7 @@ pub struct VMStoreContext {
     /// This member is `0` when Wasm is actively running and has not called out
     /// to the host.
     ///
-    /// Used to find the start of a a contiguous sequence of Wasm frames when
+    /// Used to find the start of a contiguous sequence of Wasm frames when
     /// walking the stack.
     pub last_wasm_exit_fp: UnsafeCell<usize>,