fixed arguments from root parser not formatted

spec/commands_spec.lua

@@ -0,0 +1,13 @@
+local argparse = require "argparse"
+
+describe("tests related to commands", function()
+   it("handles commands after arguments", function()
+      local parser = argparse.parser "name"
+      parser:argument "file"
+      parser:command "create"
+      parser:command "remove"
+
+      local args = parser:parse{"temp.txt", "remove"}
+      assert.same({file = "temp.txt", remove = true}, args)
+   end)
+end)