nuke: shorten help text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/klibc-utils/nuke.c b/klibc-utils/nuke.c
index 363e03c..a5d2f8d 100644
--- a/klibc-utils/nuke.c
+++ b/klibc-utils/nuke.c
@@ -16,7 +16,7 @@
 //usage:#define nuke_trivial_usage
 //usage:       "DIR..."
 //usage:#define nuke_full_usage "\n\n"
-//usage:       "Resursively remove DIRs"
+//usage:       "Remove DIRs"
 
 #include "libbb.h"