Fix linter error

Author: Reim-developer

src/back_end/tests/memory.rs

@@ -5,7 +5,7 @@ fn test_memory_mod() {
     use std::ptr::null_mut;
 
     let raw_str = CString::new("Reim-developer")
-        .map(|raw| raw.into_raw())
+        .map(CString::into_raw)
         .unwrap_or(null_mut());
 
     unsafe {