rm comments

comment global SIGINT handling

impl undo for global; improve debug

tidy Buffer, History types

rename Session.buf to Session.buffer

tidy

minimize code scope

refactor type CommandFn

refactor errors

flatten InteractionError in strerror

refactor debugging

rm UnexpectedEOF, scanline()

upgrade for-each

handle signals

upgrade for-each

history: keep cursor within bounds

Signed-off-by: Curtis Arthaud <uku82@gmx.fr>

add missing assert_noaddrs()

simplify filename logic

tidy

cmd_write(): dont set modified when write to shell