Terminals, Namespaces and Nonterminal/Terminal-Mappings not cleaned when reimporting
check e.g. attached export
(from redmine: issue id 788, created on 2018-01-22tgradl)
- Relations:
- relates #826
check e.g. attached export
(from redmine: issue id 788, created on 2018-01-22tgradl)