On line 955 of src/stty.c there is an empty string marked for
translation.
fputs (_("\
"), stdout);This might actually be harmful. Po files use the translation of the empty string as a header. So depending on the gettext implementation, it might be replaced by a header which I'm sure isn't intended. (Maybe GNU gettext guards against this, I haven't investigated. But even if so, it is still pretty pointless to mark it for translation.)
