anchor.diff:  
   ==== Aggregating functions
   
  +* `avg()`
  +* `collect()`
   * `count()`
  -* `collect()`
  -* `avg()`
  -* `sum()`
   * `max()`
   * `min()`
   * `percentileCont()`
   * `percentileDisc()`
   * `stdev()`
   * `stdevP()`
  -
  +* `sum()`
   
   === Types
   
  
positive.code: 
  === Clauses
  
  * `MATCH`
  * `RETURN`
  * `UNWIND`
  * `OPTIONAL MATCH`
  * `WITH`
  * `UNION`
  * `CREATE`
  * `MERGE`
  * `SET`
  * `DELETE`
  * `DETACH DELETE`
  * `REMOVE`
  * `CALL ... YIELD`
  
  ==== Sub-clauses
  
  * `ON CREATE`
  * `ON MATCH`
  * `WHERE`
  * `ORDER BY`
  * `SKIP`
  * `LIMIT`
  
  === Operators
  
  * `DISTINCT`
  * `STARTS WITH`
  * `CONTAINS`
  * `ENDS WITH`
  * `IN`
  * `=`
  * `<>`
  * `<`
  * `>`
  * `\<=`
  * `>=`
  * `+`
  * `-`
  * `/`
  * `*`
  * `%`
  * `^`
  * `AND`
  * `OR`
  * `NOT`
  * `IS NULL`
  * `IS NOT NULL`
  * `.` (property access)
  * `[]` (subscript)
  * `XOR`
  
  === Expressions
  
negative.code: 
  === Clauses
  
  * `CREATE UNIQUE`
  * `FOREACH`
  * `START`
  * `LOAD CSV`
  
  === Hints
  
  * `USING INDEX`
  * `USING JOIN`
  * `USING PERIODIC COMMIT`
  * `USING SCAN`
  
  === Commands
  
  * `CREATE CONSTRAINT`
  * `CREATE INDEX`
  
  === Operators
  
  