In term-mode, when switching from line-mode (C-c C-j) to char-mode (C-c
C-k), a newline is appended at the end, thus sending out the text that
was previously entered in line-mode to the shell right away. Most of the
time, that is not what I want. I usually want to edit further before
sending the command to the shell.

I looked at the 'term-char-mode' function and it seems to prevent the
newline by temporarily overriding 'term-input-sender' with
'term-send-string', but it doesn't seem to work as intended
somehow. This is the snippet of the code.

        (unwind-protect
            (progn
              (add-function :override term-input-sender #'term-send-string)
              (end-of-line)
              (term-send-input))
          (remove-function term-input-sender #'term-send-string))))

I'm not sure why this doesn't work.
And not sure whether this is new in 27.1 or pre-existing.


In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.20),
modified by Debian
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux rodete

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Configured using:
 'configure --build x86_64-linux-gnu --build x86_64-linux-gnu
 --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib
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Configured features:
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ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF XFT ZLIB
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Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=fcitx
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
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Load-path shadows:
None found.

Features:
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backquote threads dbusbind inotify lcms2 dynamic-setting
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Memory information:
((conses 16 50862 11535)
 (symbols 48 6786 1)
 (strings 32 17486 2323)
 (string-bytes 1 576575)
 (vectors 16 11421)
 (vector-slots 8 145518 16770)
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