clarified signature and modules; more basic Rich_Text.formatted_lines, assuming that elements are properly separated according to Rich_Text.format;

performance tuning for macOS (after update of "jedit" component): old OpenGL works better for text rendering;

performance tuning: more incremental update of buffer content;

obsolete;

clarified: more uniform results;

clarified signature: inline org.gjt.sp.jedit.textarea.TextArea.setText();

minor performance tuning: avoid concatenation of existing string material;

clarified signature and data storage: incremental lazy values;

tuned comments;

clarified signature;