Don't use strings directly in calls to usage().  This is in preparation
for their extraction to a separate file.
diff --git a/coreutils/length.c b/coreutils/length.c
index c7df216..82f50c1 100644
--- a/coreutils/length.c
+++ b/coreutils/length.c
@@ -4,15 +4,17 @@
 #include <string.h>
 #include <stdio.h>
 
+const char length_usage[] =
+	"length STRING\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+	"\nPrints out the length of the specified STRING.\n"
+#endif
+	;
+
 extern int length_main(int argc, char **argv)
 {
-	if (argc != 2 || **(argv + 1) == '-') {
-		usage("length STRING\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
-				"\nPrints out the length of the specified STRING.\n"
-#endif
-				);
-	}
+	if (argc != 2 || **(argv + 1) == '-')
+		usage(length_usage);
 	printf("%lu\n", (long)strlen(argv[1]));
 	return (TRUE);
 }