LE has many block operations with stream and rectangular blocks, can edit
both unix and dos style files (LF/CRLF), is binary clean, has hex mode,
can edit text with multi-byte character encoding, has full undo/redo, can
edit files and mmap-able devices in mmap shared mode (only replace), has
tunable syntax highlighting, tunable color scheme (can use default colors),
tunable key map.