These were forgotten in the last LibLine commit, any changes to m_buffer
not going through insert() and remove_at_index() should also be updating
these.
Fixes#5440.
This patchset allows the editor to avoid redrawing the entire line when
the changes cause no unrecoverable style updates, and are at the end of
the line (this applies to most normal typing situations).
Cases that this does not resolve:
- When the cursor is not at the end of the buffer
- When a display refresh changes the styles on the already-drawn parts
of the line
- When the prompt has not yet been drawn, or has somehow changed
Fixes#5296.
ctype's `iscntrl` truncates its input, making some codepoints appear as
control characters. Avoid this by checking whether the character is in
ascii to begin with.
