State 'configure introducer' in SLS 'introducer' is not formed as a list

introducer.sls

configure introducer:
  user.present:
    - name: "introducer"                                                                                 
    - shell: "/bin/false"                                                                                
    - home: "/srv/introducer"                                                                            

  python2.7:
    pkg:
      - "installed"

  virtualenv:
    pkg:
      - "installed"

  # https://docs.saltstack.com/en/latest/ref/states/all/salt.states.virtualenv_mod.html                                                                                                                            
  virtualenv.managed:
    - name: "/srv/introducer/virtualenv"                                                                 
    - require:
        - pkg: "python2.7"
        - pkg: "virtualenv"                                                                              
    - user: "introducer"
    - python: "python2.7"
    - system_site_packages: false
    - pip_pkgs:
        - "tahoe-lafs==1.12.1"

  cmd.run:
    - name: >
        /srv/storage/virtualenv/bin/tahoe create-introducer
            --basedir /srv/introducer/node
            --location {{ pillar['introducer']['location'] }}
            --port {{ pillar['introducer']['port'] }}
    - creates:
      - "/srv/introducer/node/tahoe.cfg"                                                                 
      - "/srv/introducer/node/private"

  mine.send:                                                                                             
    - name: "introducer.furl"
    - func: "file.read"
    - path: "/srv/introducer/node/introducer.furl"