diff --git a/update_doc b/update_doc
index 5178493..3e36c26 100755
--- a/update_doc
+++ b/update_doc
@@ -11,7 +11,7 @@ regex = re.compile("DOCUMENTATION *= *r?(?P<quote>\"{3}|'{3})(---)?.*?(?P=quote)
 
 if __name__ == "__main__":
     for modfile in moduledir.iterdir():
-        if modfile.name in ( "__init__.py", "__pycache__"):
+        if modfile.name in ( "__init__.py", "__pycache__", "unit.py.example"):
             continue
         mod = importlib.import_module(".".join((modfile.parts[:-1])+(modfile.stem,)))
         if hasattr(mod, "Module"):
@@ -36,5 +36,6 @@ if __name__ == "__main__":
             continue
         newmod = "{pre}DOCUMENTATION = {quote}{doc}{quote}{post}".format(pre=moddata[:match.start()], quote=match.group("quote"), doc=moddoc, post=moddata[match.end():])
         modfile.write_text(newmod)
+        print("updated the documentation of module {}".format(module.name))
 
 # code: python