Project Cards with `changes` are not written out correctly

[DavidOry]

See the &id001 above the second category entry

For example:

project: add san mateo bridge toll plaza
tags:
- Year 2015
- Toll Plaza
dependencies: ''
changes:
- category: Roadway Deletion
  links:
    model_link_id:
    - 3073690
- &id001
  category: Add New Roadway
  links:
  - A: 2562924
    B: 2625977
    bike_access: 0
    county: Alameda
    drive_access: 1
    model_link_id: 3443532
    rail_only: 0
    shstGeometryId: ''
    walk_access: 0
    tollbooth: 0
    ft: 1
    lanes: 4
    assignable: 1
  - A: 2625977
    B: 2535792
    bike_access: 0
    county: Alameda
    drive_access: 1
    model_link_id: 3443533
    rail_only: 0
    shstGeometryId: ''
    walk_access: 0
    ft: 7
    lanes: 7
    assignable: 1
  nodes:
  - bike_access: 0
    county: Alameda
    drive_access: 1
    rail_only: 0
    walk_access: 0
    model_node_id: 2625977
    osm_node_id: ''
    X: -122.147744
    Y: 37.6193308
file: ./projects/year_2015_san_mateo_bridge_add_plaza_link.yml
valid: false
1: *id001