Change 'printf("%s\n", ...)' into 'puts(...)'.  Noted and patched in hostname.c
by Larry Doolittle.
diff --git a/coreutils/id.c b/coreutils/id.c
index 3f90d55..85b288c 100644
--- a/coreutils/id.c
+++ b/coreutils/id.c
@@ -79,12 +79,12 @@
 
 	if (no_group) {
 		if(name_not_number && user)
-			printf("%s\n",user);
+			puts(user);
 		else
 			printf("%ld\n", pwnam);
 	} else if (no_user) {
 		if(name_not_number && group)
-			printf("%s\n", group);
+			puts(group);
 		else
 			printf("%ld\n", grnam);
 	} else {