* Fix jumping back to label to process more than two lines.
* Take care of trailing commas that do not end the entry.

It is unclear if this will be fixed soon or at all.

Try to always apply the same pattern to match field names.
Add one test, but the test coverage is still not very good.

The new failure was introduced by a testMergeLinesWithBraces fix in
commit 13c7cfd4. A failing test case there helps to find the error.

The arrow notation -> is correctly recognized by the \ch{} macro.

The @ sign impeded determination of the entry type in the first record.