It supports reordering of arguments but you need to explicitly
give each argument a position number, in the format string.
See: http://linux.die.net/man/3/printf
I know, but translators don't get that much info from the argument number
when it comes to translate "before doing %$1s, you must %$2s!", while
the *meaning* of each argument
could leads to a better translation eventually changing the order.
Named arguments can vehicle such meaning.
And make the code more easier to understand, too.
One can argue that B_TRANSLATE_COMMENT() too, though.
