Bug#910877: apt: Inconsistent behavior for a package version with an epoch

[Orangey]

Package: apt
Version: 1.4.8


$ apt-get source mongodb-dev=2:1.1.2-5
Fetched
$ apt-get source mongodb-dev=1.1.2-5
Fetched

$ apt-get download mongodb-dev=2:1.1.2-5
Fetched
$ apt-get download mongodb-dev=1.1.2-5
E: Version '1.1.2-5' for 'mongodb-dev' was not found

$ apt-get changelog mongodb-dev=2:1.1.2-5
Fetched
$ apt-get changelog mongodb-dev=1.1.2-5
E: Version '1.1.2-5' for 'mongodb-dev' was not found


It would be nice, if all commands select package of version with the
highest epoch automatically.