cgroups.7: ffix

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

man7/cgroups.7

@@ -367,7 +367,11 @@ A cgroup filesystem initially contains a single root cgroup, '/',
 which all processes belong to.
 A new cgroup is created by creating a directory in the cgroup filesystem:
 .PP
-    mkdir /sys/fs/cgroup/cpu/cg1
+.in +4n
+.EX
+mkdir /sys/fs/cgroup/cpu/cg1
+.EE
+.in
 .PP
 This creates a new empty cgroup.
 .PP
@@ -375,7 +379,11 @@ A process may be moved to this cgroup by writing its PID into the cgroup's
 .I cgroup.procs
 file:
 .PP
-    echo $$ > /sys/fs/cgroup/cpu/cg1/cgroup.procs
+.in +4n
+.EX
+echo $$ > /sys/fs/cgroup/cpu/cg1/cgroup.procs
+.EE
+.in
 .PP
 Only one PID at a time should be written to this file.
 .PP
@@ -514,7 +522,11 @@ The available controllers are automatically mounted,
 meaning that it is not necessary (or possible) to specify the controllers
 when mounting the cgroup v2 filesystem using a command such as the following:
 .PP
-    mount -t cgroup2 none /mnt/cgroup2
+.in +4n
+.EX
+mount -t cgroup2 none /mnt/cgroup2
+.EE
+.in
 .PP
 A cgroup v2 controller is available only if it is not currently in use
 via a mount against a cgroup v1 hierarchy.
@@ -715,7 +727,11 @@ For each cgroup hierarchy of which the process is a member,
 there is one entry containing three
 colon-separated fields of the form:
 .IP
-     hierarchy-ID:controller-list:cgroup-path
+.in +4n
+.EX
+hierarchy-ID:controller-list:cgroup-path
+.EE
+.in
 .IP
 For example:
 .IP