Syntax highlighting in YAML fails with quotes

[alexmbird]

---
- name: "Install docker-engine, version {{ docker_engine_version }}"
  apt: pkg="docker-engine={{ docker_engine_version }}" state=installed update_cache=true cache_valid_time=3600
  sudo: yes
  tags:
    - docker_setup
    - initial_setup
  notify: Restart docker-engine

- name: Generate /etc/default/docker
  notify: Restart docker-engine

Highlighting fails somewhere on the apt: pkg="docker-engine line and the rest of my file is treated as quoted text. Please to fix, I keep messing up my YAML :(