fix typos

bus-mapping/src/circuit_input_builder.rs

@@ -34,9 +34,9 @@ pub use transaction::{Transaction, TransactionContext};
 ///
 /// 1. Take a [`eth_types::Block`] to build the circuit input associated with
 /// the block. 2. For each [`eth_types::Transaction`] in the block, take the
-/// [`eth_types::GethExecTrace`] to    build the circuit input associated with
-/// each transaction, and the bus-mapping operations    associated with each
-/// `eth_types::GethExecStep`] in the [`eth_types::GethExecTrace`].
+/// [`eth_types::GethExecTrace`] to build the circuit input associated with
+/// each transaction, and the bus-mapping operations associated with each
+/// [`eth_types::GethExecStep`] in the [`eth_types::GethExecTrace`].
 ///
 /// The generated bus-mapping operations are:
 /// [`StackOp`](crate::operation::StackOp)s,