Save a few bytes in error message.
diff --git a/libbb/obscure.c b/libbb/obscure.c
index 8df3e75..4d159a7 100644
--- a/libbb/obscure.c
+++ b/libbb/obscure.c
@@ -163,7 +163,7 @@
 		msg = "too similiar";
 
 	else if ( strstr(newval, pwdp->pw_name) )
-		msg = "don't use something like your username as password";
+		msg = "username in password";
 
 	else {
 		safe_strncpy(wrapped + lenwrap, wrapped, lenwrap + 1);