*: more --help tweaks, mostly expanding ts --help

function                                             old     new   delta
packed_usage                                       33554   33596     +42

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/archival/tar.c b/archival/tar.c
index 9d4c7b6..4a540b7 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -775,7 +775,7 @@
 //usage:	IF_FEATURE_TAR_NOPRESERVE_TIME("m")
 //usage:	"vokO] "
 //usage:	"[-f TARFILE] [-C DIR] "
-//usage:	IF_FEATURE_TAR_FROM("[-T FILE] [-X FILE] "IF_FEATURE_TAR_LONG_OPTIONS("[OPTION]... "))
+//usage:	IF_FEATURE_TAR_FROM("[-T FILE] [-X FILE] "IF_FEATURE_TAR_LONG_OPTIONS("[LONGOPT]... "))
 //usage:	"[FILE]..."
 //usage:#define tar_full_usage "\n\n"
 //usage:	IF_FEATURE_TAR_CREATE("Create, extract, ")