Bug#854932: debian-installer: can't remove lvm volume when use Japanse

[Youhei SASAKI <uwabami@gfd-dennou.org>]

Package: debian-installer
Severity: important

Dear Maintainer,

   * What led up to the situation?

     Using lang: "Japanese"

     - Create LVM partition. - success
     - Create volume         - success
     - remove volume         - error, console color change "red"

       switch Alt-F2, the command "lvremove /dev/foo/bar" is success. 

     When using lang: "English", there are any problems. It's fine.
     

Just report. 

-- System Information:
Debian Release: 9.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (90, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=ja_JP.UTF-8, LC_CTYPE=ja_JP.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)