doc: make the tail --sleep-interval help less confusing

* src/tail.c (usage): I read "approximately S seconds"
as "approximately 5 seconds" for approximately 5 seconds.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tail.c b/src/tail.c
index 6077473c0..fee3f1f2d 100644
--- a/src/tail.c
+++ b/src/tail.c
@@ -290,7 +290,7 @@ Mandatory arguments to long options are mandatory for short options too.\n\
                              name, i.e., with --follow=name\n\
 "), stdout);
      fputs (_("\
-  -s, --sleep-interval=S   with -f, sleep for approximately S seconds\n\
+  -s, --sleep-interval=N   with -f, sleep for approximately N seconds\n\
                              (default 1.0) between iterations\n\
   -v, --verbose            always output headers giving file names\n\
 "), stdout);