output of package sources without Release file misses line breaks

Example output

    The repository 'http://coda.cs.cmu.edu/coda yakkety Release' does not have a Release file.Updating from such a repository can't be done securely, and is therefore disabled by default.See apt-secure(8) manpage for repository creation and user configuration details.The repository 'http://ppa.launchpad.net/freecad-maintainers/freecad-stable/ubuntu yakkety Release' does not have a Release file.Updating from such a repository can't be done securely, and is therefore disabled by default.See apt-secure(8) manpage for repository creation and user configuration details.The repository 'http://ppa.launchpad.net/i2p-maintainers/i2p/ubuntu yakkety Release' does not have a Release file.Updating from such a repository can't be done securely, and is therefore disabled by default.See apt-secure(8) manpage for repository creation and user configuration details.The repository 'http://ppa.launchpad.net/openscad/releases/ubuntu yakkety Release' does not have a Release file.Updating from such a repository can't be done securely, and is therefore disabled by default.See apt-secure(8) manpage for repository creation and user configuration details.The repository 'http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu yakkety Release' does not have a Release file.Updating from such a repository can't be done securely, and is therefore disabled by default.See apt-secure(8) manpage for repository creation and user configuration details.The repository 'http://ppa.launchpad.net/wfg/0ad/ubuntu yakkety Release' does not have a Release file.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: synaptic 0.83+nmu1ubuntu1
Uname: Linux 4.8.1-040801-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Oct 17 14:10:47 2016
InstallationDate: Installed on 2015-12-12 (309 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: synaptic
UpgradeStatus: Upgraded to yakkety on 2016-10-17 (0 days ago)