anchor.diff:  ----
   CREATE (N {Prop: 0})
   WITH RAND() AS Rand, {param} AS MAP
  -RETURN Rand, MAP.property_key
  +RETURN Rand, MAP.property_key, Count(N)
   ----
   +
   .Good
  
positive.code: ----
  
  . *Patterns*:
  .. Chain patterns together to avoid repeating variables.
  +
  .Bad
  [source, cypher]
  ----
  MATCH (person)-->(vehicle), (vehicle)-->(manufacturer)
  RETURN count(vehicle)
  ----
  +
  .Good
  [source, cypher]
  ----
  MATCH (person)-->(vehicle)-->(manufacturer)
  RETURN count(vehicle)
  ----
  
  
negative.code: [source, cypher]
  ----
  MATCH person-->vehicle
  RETURN person, vehicle
  ----
  +
  .Good
  [source, cypher]
  ----
  MATCH (person)-->(vehicle)
  RETURN person, vehicle
  ----
  
  . Avoid having to use back-ticks to escape characters and keywords.
  