Error in readme file

[mzarozinski]

There is an error with the search command. Either there is a missing double quote for the top_k param, or there should not be one after the 1000:

python3 run.py search
--repo osirrc2019/indri
--tag v0.1.0
--output out/indri
--qrels qrels/qrels.robust04.txt
--topic topics/topics.robust04.txt
--collection robust04 \
--top_k 1000"
--opts out_file_name="robust.dir1000" rule="method:dirichlet,mu:1000" topic_type="title" use_prf="0"