Bug#913237: xterm: exec-formatted yields a tilde character in zsh and emacs

[Vincent Lefevre <vincent@vinc17.net>]

Package: xterm
Version: 337-1
Severity: normal

In my XTerm configuration, I have:

*VT100*translations:            #override \n\
        Meta<Btn1Down>:         exec-formatted("browser %s", PRIMARY)

The problem is that when exec-formatted is invoked from zsh or emacs
(when run in xterm, e.g. with "emacs -nw"), a ~ character appears.

Other shells such as dash, bash and ksh are not affected. Curses
applications such as mutt and tack are not affected either.

-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.18.0-2-amd64 (SMP w/12 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=POSIX (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages xterm depends on:
ii  libc6           2.27-8
ii  libfontconfig1  2.12.6-0.1
ii  libfreetype6    2.6.3-3.2
ii  libice6         2:1.0.9-2
ii  libtinfo6       6.1+20181013-1
ii  libutempter0    1.1.6-3
ii  libx11-6        2:1.6.7-1
ii  libxaw7         2:1.0.13-1+b2
ii  libxft2         2.3.2-2
ii  libxinerama1    2:1.1.4-1
ii  libxmu6         2:1.1.2-2
ii  libxpm4         1:3.5.12-1
ii  libxt6          1:1.1.5-1
ii  xbitmaps        1.1.1-2

Versions of packages xterm recommends:
ii  x11-utils  7.7+4

Versions of packages xterm suggests:
pn  xfonts-cyrillic  <none>

-- no debconf information