show user error as on command-line, e.g. relevant for unexpected crashes;

afford early initialization of JEdit_Options, but it may lead to messy exception trace for malformed etc/preferences (see also 6eeaaefcea56); tuned signature;

tuned message;

normalize changes strictly as specified in the protocol definition (assuming non-overlapping ranges, amending 0f555ce33970), e.g. relevant for automatic quotes/parentheses around selection;

always update decorations eventually after document changes: VSCode might reset it, but PIDE might produce an unchanged result that is not published again;

avoid race condition between current_state().stable_tip_version and model.rendering();

tuned;

updated dependencies;

explicitly ignore "initialized" message;

clarified shutdown;