0c2d71edba
Summary: This PR replaces several "readadhead" typos with "readahead". Pull Request resolved: https://github.com/facebook/rocksdb/pull/7953 Reviewed By: ajkr Differential Revision: D26518903 Pulled By: jay-zhuang fbshipit-source-id: 6f7dece0e39ec4f71c4a936399bcb2e02574f42a