具有字符值的 `ANSI_SEQUENCES` 条目会插入其转义序列,而不是字符

Vt100Parser._call_handler(key, insert_text) is called with insert_text = the matched bytes, and builds KeyPress(key, insert_text). key_binding/bindings/basic.py:168 binds Keys.Any → self-insert. key_binding/bindings/named_commands.py:273 — self-insert does insert_text(event.data * event.arg).

So insertion is driven by data, and data is the raw sequence. This is invisible for every entry prompt_toolkit ships, because those resolve to Keys members whose bindings never read data. It only bites character-valued entries, which the table accepts without complaint.