Merge pull request #366 from voxpupuli/cleanup_fixtures

chore: cleanup .fixtures.yml

Author: TheMeier

.fixtures.yml

@@ -1,5 +1,6 @@
+---
 fixtures:
   repositories:
-    concat: "https://github.com/puppetlabs/puppetlabs-concat.git"
-    stdlib: "https://github.com/puppetlabs/puppetlabs-stdlib.git"
-    systemd: "https://github.com/voxpupuli/puppet-systemd.git"
+    concat: https://github.com/puppetlabs/puppetlabs-concat.git
+    stdlib: https://github.com/puppetlabs/puppetlabs-stdlib.git
+    systemd: https://github.com/voxpupuli/puppet-systemd.git