[git commit] usage: do not print trailing space for commands which have no arguments

[Denys Vlasenko]

commit: https://git.busybox.net/busybox/commit/?id=253f555f01fa380083a7436a569397a4e7f997b0
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

function                                             old     new   delta
bb_show_usage                                        120     130     +10

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 libbb/appletlib.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libbb/appletlib.c b/libbb/appletlib.c
index 769b7881c..f155d0908 100644
--- a/libbb/appletlib.c
+++ b/libbb/appletlib.c
@@ -169,8 +169,11 @@ void FAST_FUNC bb_show_usage(void)
 		else {
 			full_write2_str("\nUsage: ");
 			full_write2_str(applet_name);
-			full_write2_str(" ");
-			full_write2_str(p);
+			if (p[0]) {
+				if (p[0] != '\n')
+					full_write2_str(" ");
+				full_write2_str(p);
+			}
 			full_write2_str("\n");
 		}
 		if (ENABLE_FEATURE_CLEAN_UP)