Comment spelling fixes.

src/core/cgroup.c

@@ -509,7 +509,7 @@ int unit_realize_cgroup(Unit *u) {
          * unit, we need to first create all parents, but there's more
          * actually: for the weight-based controllers we also need to
          * make sure that all our siblings (i.e. units that are in the
-         * same slice as we are) have cgroup too. Otherwise things
+         * same slice as we are) have cgroups, too. Otherwise things
          * would become very uneven as each of their processes would
          * get as much resources as all our group together. This call
          * will synchronously create the parent cgroups, but will

src/core/manager.c

@@ -1796,7 +1796,7 @@ int manager_loop(Manager *m) {
         manager_check_finished(m);
 
         /* There might still be some zombies hanging around from
-         * before we were exec()'ed. Leat's reap them */
+         * before we were exec()'ed. Let's reap them. */
         r = manager_dispatch_sigchld(m);
         if (r < 0)
                 return r;