Lavrentiev, Anton (NIH/NLM/NCBI) [C] via Cygwin wrote:
I then see "C-@" echoed in the minibuffer, and the resulting *Help* buffer says
WFIW, in the DEC VT terminals (from where most of ANSI controls stem from),
Ctrl-Space used to
generate a NUL character (ASCII '\0'), and so maybe it is seen as a fill
character by the OP's
terminal and, therefore, is ignored.
Cygwin also generates NUL:
$ od -t x1
1[Ctrl+Space]2[Ctrl+Space][Ctrl+Space]3[Return]
[Ctrl+D]
0000000 31 00 32 00 00 33 0a
...
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