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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.lang.c
Subject: Re: Rationale for aligning data on even bytes in a Unix shell file?
Date: Fri, 9 May 2025 02:26:15 -0000 (UTC)
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On Thu, 8 May 2025 18:50:33 -0500, BGB wrote:

> But, I don't bother with C1 control codes, as they are unused ...

Mostly true. But I think terminal emulators do interpret CSI as equivalent 
to ESC followed by “[”.

> In some contexts, may or may not also have ANSI escape sequences, though
> generally no text editors deal with or make use of ANSI escapes.

Editors (and other apps) running in “full-screen” mode within a terminal 
emulator would use them to control the display.