anchor.diff:  ----
   MATCH (:Person)-[own:OWNS_VEHICLE]->(:Car)
   RETURN own.since
  +----
  +
  +. Write the value `null` in lower case.
  ++
  +.Bad
  +[source, cypher]
  +----
  +WITH NULL AS n1, Null as n2
  +RETURN n1 IS NULL && n2 IS NOT NULL
  +----
  ++
  +.Good
  +[source, cypher]
  +----
  +WITH null AS n1, null as n2
  +RETURN n1 IS NULL && n2 IS NOT NULL
  +----
  +
  +. Write boolean literals in lower case.
  ++
  +.Bad
  +[source, cypher]
  +----
  +WITH TRUE AS b1, False AS b2
  +RETURN b1 && b2
  +----
  ++
  +.Good
  +[source, cypher]
  +----
  +WITH true AS b1, false AS b2
  +RETURN b1 && b2
   ----
   
   . Use camel case, starting with a lower case character, for:
  
positive.code: .. Put `ON CREATE` before `ON MATCH` if both are present.
  // no example necessary
  
  . Write keywords in upper case.
  +
  .Bad
  
negative.code: CREATE (n {prop: 0})
  WITH rand() AS rand, {param} AS map
  RETURN rand, map.propertyKey, count(n)
  ----
  
  ==== Patterns
  