tests/bonsai: str.mk: -h test

tests/bonsai/str.mk

@@ -0,0 +1,15 @@
+# Copyright (c) 2024 DTB <trinity@trinity.moe>
+# SPDX-License-Identifier: FSFAP
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice and this
+# notice are preserved.  This file is offered as-is, without any warranty.
+
+.PRAGMA: command_comment
+
+.PHONY: str_tests
+str_tests: str_help
+
+.PHONY: str_help
+str_help: $(BIN)/str
+	! $(BIN)/str -h