The lesson editor in version 2.0.0 highlights characters not available in the current lesson so there is now an effective QA instrument for this issue for the build-in courses.
Version 2.0.0 has currently no feature to train on plain text files (partly due to this issue), so no problem there.
The lesson editor in version 2.0.0 highlights characters not available in the current lesson so there is now an effective QA instrument for this issue for the build-in courses.
Version 2.0.0 has currently no feature to train on plain text files (partly due to this issue), so no problem there.