tests/test-locale.t

debug: convert a few exceptions to bytes before wrapping in another error

Caught by pytype:

    File "/mnt/c/Users/Matt/hg/mercurial/debugcommands.py", line 2118, in debugmanifestfulltextcache: Function Abort.__init__ was called with the wrong arguments [wrong-arg-types]
             Expected: (self, message: Union[bytearray, bytes, memoryview], ...)
      Actually passed: (self, message: mercurial.error.LookupError, ...)
    File "/mnt/c/Users/Matt/hg/mercurial/debugcommands.py", line 2453, in debugobsolete: Function _bytestr.__init__ was called with the wrong arguments [wrong-arg-types]
             Expected: (self, ints: Iterable[int])
      Actually passed: (self, ints: ValueError)
      The following methods aren't implemented on ValueError:
      __iter__

Differential Revision: https://phab.mercurial-scm.org/D10174

  $ LANG=nonexistent LC_ALL=nonexistent LANGUAGE=nonexistent hg version -q
  Mercurial Distributed SCM (version *) (glob)