tests/test-i18n.t

hgrc.5: drop 'hgext.' prefix when talking about extensions

The first paragraph apply to all extensions, not just those in hgext.
The second paragraph can just use the simpler form to load mq.

Translations are optional:

  $ "$TESTDIR/hghave" gettext || exit 80

Test that translations are compiled and installed correctly.

Default encoding in tests is "ascii" and the translation is encoded
using the "replace" error handler:

  $ LANGUAGE=pt_BR hg tip
  abortado: N?o h? um reposit?rio do Mercurial aqui (.hg n?o encontrado)!
  [255]

Using a more accomodating encoding:

  $ HGENCODING=UTF-8 LANGUAGE=pt_BR hg tip
  abortado: N\xc3\xa3o h\xc3\xa1 um reposit\xc3\xb3rio do Mercurial aqui (.hg n\xc3\xa3o encontrado)! (esc)
  [255]

Different encoding:

  $ HGENCODING=Latin-1 LANGUAGE=pt_BR hg tip
  abortado: N\xe3o h\xe1 um reposit\xf3rio do Mercurial aqui (.hg n\xe3o encontrado)! (esc)
  [255]