Polish docs

- Add more info into what's new in 1.2.8
- Small polish
- Relates to #476

docs/src/reference/asciidoc/sm.adoc

@@ -2596,8 +2596,7 @@ Actual _Repository_ implementation for a _JPA_ is
 `JpaStateMachineRepository` which is backed by _Entity_ class
 `JpaRepositoryStateMachine`.
 
-Generic way to persist machine for jpa is shown below. This is
-equivalent to machine shown in <<image-sm-repository-simplemachine>>.
+Generic way to persist machine for jpa is shown below.
 
 [source,java,indent=0]
 ----
@@ -2610,8 +2609,7 @@ Actual _Repository_ implementation for a _Redis_ is
 `RedisStateMachineRepository` which is backed by _Entity_ class
 `RedisRepositoryStateMachine`.
 
-Generic way to persist machine for jpa is shown below. This is
-equivalent to machine shown in <<image-sm-repository-simplemachine>>.
+Generic way to persist machine for jpa is shown below.
 
 [source,java,indent=0]
 ----
@@ -2624,8 +2622,7 @@ Actual _Repository_ implementation for a _MongoDB_ is
 `MongoDbStateMachineRepository` which is backed by _Entity_ class
 `MongoDbRepositoryStateMachine`.
 
-Generic way to persist machine for jpa is shown below. This is
-equivalent to machine shown in <<image-sm-repository-simplemachine>>.
+Generic way to persist machine for jpa is shown below.
 
 [source,java,indent=0]
 ----

docs/src/reference/asciidoc/whatsnew.adoc

@@ -41,4 +41,9 @@ not seen in a point release but these changes didn't merit a fork of
 _Spring Statemachine 1.3_.
 
 * JPA entity classes have changed table names <<sm-repository-config-jpa>>
+* New sample <<statemachine-examples-datajpapersist>>
+* New _Entity_ classes for persistence <<sm-repository-persistence>>
+  used with <<sm-repository-persistence>>
+* Transition conflict policy mentioned in
+  <<statemachine-config-commonsettings>>