close.2, getpriority.2, ioctl_userfaultfd.2, expm1.3, lio_listio.3, rcmd.3, lirc.4, mount_namespaces.7: tfix: Fix punctuation

Found using:
$ pcregrep -rnM '^..[^"].*[^.]\.\n[a-z]' man?

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

man2/close.2

@@ -148,7 +148,7 @@ The behavior in this situation varies across systems.
 On some systems, when the file descriptor is closed,
 the blocking system call returns immediately with an error.
 .PP
-On Linux (and possibly some other systems), the behavior is different.
+On Linux (and possibly some other systems), the behavior is different:
 the blocking I/O system call holds a reference to the underlying
 open file description, and this reference keeps the description open
 until the I/O system call completes.

man2/getpriority.2

@@ -93,7 +93,7 @@ calling process, or the real user ID of the calling process.
 .PP
 The
 .I prio
-argument is a value in the range \-20 to 19 (but see NOTES below).
+argument is a value in the range \-20 to 19 (but see NOTES below),
 with \-20 being the highest priority and 19 being the lowest priority.
 Attempts to set a priority outside this range
 are silently clamped to the range.

man2/ioctl_userfaultfd.2

@@ -173,7 +173,7 @@ when the faulting process unmaps virtual memory either explicitly with
 or implicitly during either
 .BR mmap (2)
 or
-.BR mremap (2).
+.BR mremap (2),
 the userfaultfd monitor will receive an event of type
 .BR UFFD_EVENT_UNMAP .
 .TP

man3/expm1.3

@@ -162,10 +162,10 @@ Before approximately glibc version 2.11,
 .\" but not expm1(1.00199970128e5) and beyond.
 .BR expm1 ()
 raised a bogus invalid floating-point exception in addition to the expected
-overflow exception, and returned a NaN instead of positive infinity.
+overflow exception, and returned a NaN instead of positive infinity,
 for some large positive
 .I x
-values,
+values.
 .PP
 Before version 2.11,
 .\" It looks like the fix was in 2.11, or possibly 2.12.

man3/lio_listio.3

@@ -71,7 +71,7 @@ The
 .I nitems
 argument specifies the size of the array
 .IR aiocb_list .
-null pointers in
+Null pointers in
 .I aiocb_list
 are ignored.
 .PP

man3/rcmd.3

@@ -172,9 +172,9 @@ This socket is suitable for use by
 and several other functions.
 Privileged ports are those in the range 0 to 1023.
 Only a privileged process
-(on Linux: a process that has the
+(on Linux, a process that has the
 .B CAP_NET_BIND_SERVICE
-capability in the user namespace governing its network namespace).
+capability in the user namespace governing its network namespace)
 is allowed to bind to a privileged port.
 In the glibc implementation,
 this function restricts its search to the ports from 512 to 1023.

man4/lirc.4

@@ -148,7 +148,7 @@ The following ioctls can be used to probe or change specific
 .B lirc
 hardware settings.
 Many require a third argument, usually an
-.IR int .
+.IR int ,
 referred to below as
 .IR val .
 .\"

man7/mount_namespaces.7

@@ -1100,9 +1100,9 @@ may desire to prevent propagation of mount events to other mount namespaces
 .BR unshare (1)).
 This can be done by changing the propagation type of
 mount points in the new namespace to either
-.BR MS_SLAVE
+.B MS_SLAVE
 or
-.BR MS_PRIVATE .
+.BR MS_PRIVATE ,
 using a call such as the following:
 .PP
 .in +4n