n_tty: Fix handling of control characters and continuations
Fix process_output_block to detect continuation characters correctly and to handle control characters even when O_OLCUC is enabled. Make similar change to do_output_char(). Signed-off-by: Joe Peterson <joe@skyrush.com> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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