Some zero day bugs in the parser were fixed and grammar in our documentation also needs to be fixed, because it describes various clauses incorrectly.

Unfortunately, corrected definitions immediately break code completion in H2 Console (perhaps they are too complex for the current algorithm) and our tests (most likely due to the same reason).

If nobody wants to reimplement classes in bnf package I propose the following workaround:

1. Current grammar will be extracted from help.csv into own file to be used by code completion and its tests.
2. A new grammar will be written with only some very basic tests for its correctness and this grammar will be used by the HELP command and in documentation.