[DOCS] Cleanup "USING EMBEDDED RECORDS" API readability
Remove extra space in code example
Merge pull request #2283 from knownasilya/patch-1

[DOCS] Cleanup "USING EMBEDDED RECORDS" API readability
Serialize belongsTo where id===null as null
Merge pull request #2287 from emberjs/nullSerialize

Serialize belongsTo where id===null as null
Improve comments for the inverseFor method
Added implicit relationships

We now correctly remove a record from a manyArray when it is deleted
even if the record does not have a belongsTo relationship to the manyArray
Merge pull request #2274 from emberjs/removeFromManyArrays

Added implicit relationships