help text: regularize format, and shrink

getty: shrink, and improve comments
mount: OPT_ALL is superfluous, we already have OPT_a

function                                             old     new   delta
bcode                                                 47      25     -22
getty_main                                          2503    2349    -154
packed_usage                                       23928   23698    -230
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-406)           Total: -406 bytes
   text    data     bss     dec     hex filename
 798031     658    7428  806117   c4ce5 busybox_old
 797604     658    7428  805690   c4b3a busybox_unstripped

1 files changed, 1 insertions, 3 deletions

diff --git a/util-linux/mount.c b/util-linux/mount.c
index e41707e38..796e1e103 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -1725,8 +1725,6 @@ static const char must_be_root[] ALIGN1 = "you must be root";
 int mount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int mount_main(int argc, char **argv)
 {
-        enum { OPT_ALL = 0x10 };
-
         char *cmdopts = xstrdup("");
         char *fstype = NULL;
         char *storage_path = NULL;
@@ -1771,7 +1769,7 @@ int mount_main(int argc, char **argv)
         // If we have no arguments, show currently mounted filesystems
 
         if (!argc) {
-                if (!(opt & OPT_ALL)) {
+                if (!(opt & OPT_a)) {
                         FILE *mountTable = setmntent(bb_path_mtab_file, "r");
 
                         if (!mountTable) bb_error_msg_and_die("no %s", bb_path_mtab_file);