[PATCH] Send diagnostics to stderr instead of stdout

[Dmitry V. Levin]

* zforce.in: In case of usage error, output short error diagnostics to
stderr instead of printing help text to stdout.
* zmore.in: Likewise.
* znew.in: Likewise.
---
 zforce.in |    2 +-
 zmore.in  |    2 +-
 znew.in   |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/zforce.in b/zforce.in
index b9e057d..fdce8b6 100644
--- a/zforce.in
+++ b/zforce.in
@@ -44,7 +44,7 @@ not compress them twice.
 Report bugs to <address@hidden>."
 
 if test $# = 0; then
-  echo "$usage"
+  echo >&2 "$0: invalid number of operands; try \`$0 --help' for help"
   exit 1
 fi
 
diff --git a/zmore.in b/zmore.in
index 64b144d..0f048c9 100644
--- a/zmore.in
+++ b/zmore.in
@@ -57,7 +57,7 @@ fi
 
 if test $# = 0; then
     if test -t 0; then
-       echo "$usage"
+       echo >&2 "$0: invalid number of operands; try \`$0 --help' for help"
     else
        gzip -cdfq | eval ${PAGER-more}
     fi
diff --git a/znew.in b/znew.in
index c7cdfc8..1ae466c 100644
--- a/znew.in
+++ b/znew.in
@@ -97,7 +97,7 @@ do
 done
 
 if test $# -eq 0; then
-  echo "$usage"
+  echo >&2 "$0: invalid number of operands; try \`$0 --help' for help"
   exit 1
 fi
 
-- 
ldv