address review comment

Author: kiszk

rust/arrow/src/ipc/reader.rs

@@ -310,7 +310,7 @@ fn create_primitive_array(
     make_array(array_data)
 }
 
-/// Reads the correct number of buffers based on list type a null_count, and creates a
+/// Reads the correct number of buffers based on list type and null_count, and creates a
 /// list array ref
 fn create_list_array(
     field_node: &ipc::FieldNode,

rust/arrow/src/json/reader.rs

@@ -1047,7 +1047,7 @@ mod tests {
             List(Box::new(Int64)),
             coerce_data_type(vec![&Int64, &List(Box::new(Int64))]).unwrap()
         );
-        // boolean a number are incompatible, return utf8
+        // boolean and number are incompatible, return utf8
         assert_eq!(
             List(Box::new(Utf8)),
             coerce_data_type(vec![&Boolean, &List(Box::new(Float64))]).unwrap()