Some logs in ConstantPropagateProcFactory are not straightforward

Some logs in ConstantPropagateProcFactory are not easy to understand,  like query:
 select * from tbl where a = 'a1';
showing some logs like this:
optimizer.ConstantPropagateProcFactory: Filter org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPEqual@78907a46 is identified as a value assignment, propagate it.
 
Maybe It's better to log like this:
optimizer.ConstantPropagateProcFactory: Filter (a = 'a1') is identified as a value assignment, propagate it.