Fix typo in entity state detection documentation.

Closes #2416

Author: schlagi123

src/main/asciidoc/is-new-state-detection.adoc

@@ -7,14 +7,14 @@ The following table describes the strategies that Spring Data offers for detecti
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 |===
 |`@Id`-Property inspection (the default)
-|By default, Spring Data inspects the version property of the given entity.
-If the identifier property is `null` or `0` in case of primitive types, then the entity is assumed to be new.
+|By default, Spring Data inspects the id property of the given entity.
+If the id property is `null` or `0` in case of primitive types, then the entity is assumed to be new.
 Otherwise, it is assumed to not be new.
 
 |`@Version`-Property inspection
 |If a property annotated with `@Version` is present and `null`, or in case of a version property of primitive type `0` the entity is considered new.
 If the version property is present but has a different value, the entity is considered to not be new.
-If no version property is present Spring Data falls back to inspection of the Id-Property.
+If no version property is present Spring Data falls back to inspection of the id property.
 
 |Implementing `Persistable`
 |If an entity implements `Persistable`, Spring Data delegates the new detection to the `isNew(…)` method of the entity.