implement a more generic ShowList method

apt-get is displaying various lists of package names, which until now it
was building as a string before passing it to ShowList, which inserted
linebreaks at fitting points and showed a title if needed, but it never
really understood what it was working with. With the help of C++11 the
new generic knows not only what it works with, but generates the list on
the fly rather than asking for it and potentially discarding parts of
the input (= the non-default verbose display). It also doubles as a test
for how usable the CacheSets are with C++11.

(Not all callers are adapted yet.)

Git-Dch: Ignore

1 files changed, 1 insertions, 1 deletions

diff --git a/po/bs.po b/po/bs.po
index abb9a570a..e68cee981 100644
--- a/po/bs.po
+++ b/po/bs.po
@@ -1159,7 +1159,7 @@ msgstr ""
 
 #: apt-private/private-output.cc:688
 #, c-format
-msgid "%s (due to %s) "
+msgid "%s (due to %s)"
 msgstr ""
 
 #: apt-private/private-output.cc:696