* Michael Vogt <mvo@debian.org>, 2014-06-16, 09:35:
+ _error->Warning(_("The data from '%s' is not signed. All packages from " + "that repository can not be authenticated."),
s/can not/cannot/Also, "All" with a negated verb sounds awkward to me (but that may be due to my non-native-englishness). How about:
"No packages from that repository can be authenticated." or simply "Packages from that repository cannot be authenticated." ? -- Jakub Wilk