[translations] be careful of placeholders: % ! @

[Fabio Varesano]

Hi everybody,

I would like to point out that Drupal 5 use % ! @ as placeholders in
strings, not only % as in previous versions.

So be careful about this characters in your translation.

I personally noticed that sometime poedit, while updating 4.7
translations with 5.0 pot, consider the same string if only changes
the placeholders, marking the string as already translated.

Cheers,

Fabio