Merge branch 'jc/i18n-shell-script-gettext'

The auto detection was testing if a fixed string that is known to be
non-empty is empty by mistake.

* jc/i18n-shell-script-gettext:
  i18n: fix auto detection of gettext scheme for shell scripts

git-sh-i18n.sh

@@ -21,7 +21,7 @@ GIT_INTERNAL_GETTEXT_SH_SCHEME=fallthrough
 if test -n "@@USE_GETTEXT_SCHEME@@"
 then
 	GIT_INTERNAL_GETTEXT_SH_SCHEME="@@USE_GETTEXT_SCHEME@@"
-elif test -n "@@USE_FALLTHROUGH_GETTEXT_SCHEME@@$GIT_INTERNAL_GETTEXT_TEST_FALLBACKS"
+elif test -n "$GIT_INTERNAL_GETTEXT_TEST_FALLBACKS"
 then
 	: no probing necessary
 elif test -n "$GIT_GETTEXT_POISON"