jenkinsci/jenkins — pull request #841 by olivergondza (2013-07-10 09:50:23+00:00)
Title: [FIXED 10539] Preserve backslash in Matrix buildstep properties

Fix for https://issues.jenkins-ci.org/browse/JENKINS-10539

Not sure if this should be fixed in `Util.loadProperties` or in `ArgumentListBuilder.addKeyValuePairsFromPropertyString` (or `Maven.perform` perhaps) so let's start with the former.