test-i18n: test translations

tests/test-i18n.t

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+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]