[Bug 8956] Sh outputs an extra control character

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=8956

--- Comment #3 from Denys Vlasenko <vda.linux at googlemail.com> ---
(In reply to Matthias Pall Gissurarson from comment #2)
> So apparently this is caused by EDITING_ASK_TERMINAL

Yes. But sh (to be more precise, lineedit.c code) uses that _only_ if run on a
tty.
Are you scraping tty output? Why?

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