[Bug 2137532] [NEW] tr handles UTF-8 wrong

[medontlikemusic]

Public bug reported:

```
medo at dev:~$ env | grep ^LANG
LANG=de_DE.UTF-8
medo at dev:~$ echo € | tr € E
EEE
medo at dev:~$ echo E | tr E €
�
```

should be
```
medo at dev:~$ env | grep ^LANG
LANG=de_DE.UTF-8
medo at dev:~$ echo € | tr € E
E
medo at dev:~$ echo E | tr E €
€
```

ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: coreutils-from-uutils 0.0.0~ubuntu24
ProcVersionSignature: Ubuntu 6.17.0-8.8-generic 6.17.2
Uname: Linux 6.17.0-8-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CloudArchitecture: x86_64
CloudBuildName: minimal
CloudID: nocloud
CloudName: unknown
CloudPlatform: nocloud
CloudSerial: 20251210
CloudSubPlatform: seed-dir (dmi,/dev/sr0)
Date: Tue Jan  6 09:40:25 2026
PackageArchitecture: all
ProcEnviron:
 LANG=de_DE.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-kitty
 XDG_RUNTIME_DIR=<set>
SourcePackage: coreutils-from
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: coreutils-from (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug cloud-image questing

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https://bugs.launchpad.net/bugs/2137532

Title:
  tr handles UTF-8 wrong

Status in coreutils-from package in Ubuntu:
  New

Bug description:
  ```
  medo at dev:~$ env | grep ^LANG
  LANG=de_DE.UTF-8
  medo at dev:~$ echo € | tr € E
  EEE
  medo at dev:~$ echo E | tr E €
  �
  ```

  should be
  ```
  medo at dev:~$ env | grep ^LANG
  LANG=de_DE.UTF-8
  medo at dev:~$ echo € | tr € E
  E
  medo at dev:~$ echo E | tr E €
  €
  ```

  ProblemType: Bug
  DistroRelease: Ubuntu 25.10
  Package: coreutils-from-uutils 0.0.0~ubuntu24
  ProcVersionSignature: Ubuntu 6.17.0-8.8-generic 6.17.2
  Uname: Linux 6.17.0-8-generic x86_64
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CloudArchitecture: x86_64
  CloudBuildName: minimal
  CloudID: nocloud
  CloudName: unknown
  CloudPlatform: nocloud
  CloudSerial: 20251210
  CloudSubPlatform: seed-dir (dmi,/dev/sr0)
  Date: Tue Jan  6 09:40:25 2026
  PackageArchitecture: all
  ProcEnviron:
   LANG=de_DE.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-kitty
   XDG_RUNTIME_DIR=<set>
  SourcePackage: coreutils-from
  UpgradeStatus: No upgrade log present (probably fresh install)

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