@ -268,7 +268,7 @@ class MatrixUnits(Units):
for table in req_tables[1:]:
nested_key_name = [
s["key"] for s in req_tables[0]["rows"] if
s["type"] == ("{%s}" % table["title"])
s["type"] == ("{%s}" % (table["title"],))
][0]
for row in table["rows"]:
row["key"] = "%s.%s" % (nested_key_name, row["key"])