prctl.2: ffix

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

man2/prctl.2

@@ -1013,7 +1013,7 @@ Returns the state of the speculation misfeature which is selected with
 the value of
 .IR arg2 ,
 which must be
-.B PR_SPEC_STORE_BYPASS.
+.BR PR_SPEC_STORE_BYPASS .
 Otherwise the call fails with the error
 .BR ENODEV .
 The return value uses bit 0-3 with the following meaning:
@@ -1036,22 +1036,21 @@ but cannot be undone.
 .RE
 .IP
 If all bits are
-.B 0
+0
 then the CPU is not affected by the speculation misfeature.
 .IP
 If
 .B PR_SPEC_PRCTL
 is set, then the per task control of the mitigation is available. If not set,
-.B prctl()
+.BR prctl ()
 for the speculation misfeature will fail.
 In the above operation
-.I arg3
-,
-.I arg4,
+.IR arg3 ,
+.IR arg4 ,
 and
 .I arg5
 must be specified as 0, otherwise the call fails with the error
-.BR EINVAL.
+.BR EINVAL .
 .TP
 .BR PR_SET_SPECULATION_CTRL
 Sets the state of the speculation misfeature which is selected with
@@ -1079,7 +1078,7 @@ but cannot be undone. A subsequent
 .B
 prctl(..., PR_SPEC_ENABLE)
 will fail with
-.BR EPERM.
+.BR EPERM .
 .RE
 .IP
 Any other value in
@@ -1091,7 +1090,7 @@ Also
 and
 .I arg5
 must be specified as 0, otherwise the call fails with ethe rror
-.BR EINVAL.
+.BR EINVAL .
 .IP
 Furtheremore this speculation feature can also be controlled by the boot-time
 parameter of
@@ -1711,7 +1710,7 @@ was
 or
 .BR PR_SET_SPECULATION_CTRL
 and unused arguments to
-.B prctl()
+.BR prctl ()
 are not 0.
 .SH VERSIONS
 The