-In a jail mounted with @code{noexec} it is impossible to execute any external
-program. Therefore LilyPond must be run with a backend that does not
-require any such program. As we already mentioned, it must be also run
-with superuser privileges (which, of course, it will lose immediately),
-possibly using @command{sudo}. It is a good idea to limit the number of
-seconds of CPU time LilyPond can use (e.g., using @command{ulimit
--t}), and, if your operating system supports it, the amount of memory
-that can be allocated.
+In a jail mounted with @code{noexec} it is impossible to execute any
+external program. Therefore LilyPond must be run with a backend that
+does not require any such program. As we already mentioned, it must be
+also run with superuser privileges (which, of course, it will lose
+immediately), possibly using @command{sudo}. It is a good idea to limit
+the number of seconds of CPU time LilyPond can use (e.g., using
+@command{ulimit@tie{}-t}), and, if your operating system supports it,
+the amount of memory that can be allocated.