Lwt_io.abort: fix spelling error in doc
Lwt_io.abort: fix spelling error in doc

mfp/lwt,ocsigen/lwt,gfxmonk/lwt,rgrinberg/lwt,rneswold/lwt,rgrinberg/lwt,fdopen/lwt,fdopen/lwt,ocsigen/lwt,c-cube/lwt,rneswold/lwt,gfxmonk/lwt,rgrinberg/lwt,rgrinberg/lwt,mirage/lwt,ocsigen/lwt,mfp/lwt,c-cube/lwt,rneswold/lwt,mirage/lwt,c-cube/lwt