epoll.7: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man7/epoll.7

@@ -41,14 +41,14 @@ API is the
 .IR instance ,
 an in-kernel data structure which, from a user-space perspective,
 can be considered as a container for two lists:
-.IP * 4
+.IP \(bu 2
 The
 .I interest
 list (sometimes also called the
 .B epoll
 set): the set of file descriptors that the process has registered
 an interest in monitoring.
-.IP *
+.IP \(bu
 The
 .I ready
 list: the set of file descriptors that are "ready" for I/O.
@@ -62,7 +62,7 @@ The following system calls are provided to
 create and manage an
 .B epoll
 instance:
-.IP * 3
+.IP \(bu 2
 .BR epoll_create (2)
 creates a new
 .B epoll
@@ -71,13 +71,13 @@ instance and returns a file descriptor referring to that instance.
 .BR epoll_create1 (2)
 extends the functionality of
 .BR epoll_create (2).)
-.IP *
+.IP \(bu
 Interest in particular file descriptors is then registered via
 .BR epoll_ctl (2),
 which adds items to the interest list of the
 .B epoll
 instance.
-.IP *
+.IP \(bu
 .BR epoll_wait (2)
 waits for I/O events,
 blocking the calling thread if no events are currently available.