always reports "changed"

[sdarwin]

Running an Ansible playbook multiple times should ideally result in something like:

web1.example.com : ok=55 changed=0 unreachable=0 failed=0

This role is showing

web1.example.com : ok=53 changed=2 unreachable=0 failed=0

More details:

TASK [rbenv : install plugins for selected users] ********************************************************************************************
changed: [web1.example.com] => (item=[u'test', {u'repo': u'https://github.com/rbenv/ruby-build.git', u'version': u'master', u'name': u'ruby-build'}])

TASK [rbenv : install ruby {{ item[1].version }} for select users] ***************************************************************************
changed: [web1.example.com] => (item=[u'test', {u'version': u'2.4.1'}])