DATAMONGO-2464 - Fix code examples in reference documentation.

fixed repository miss "{" issue.

Original pull request: #816.

src/main/asciidoc/reference/mongo-repositories.adoc

@@ -328,7 +328,7 @@ The following example shows how to define a `near` query that finds all persons
 ====
 [source,java]
 ----
-public interface PersonRepository extends MongoRepository<Person, String>
+public interface PersonRepository extends MongoRepository<Person, String> {
 
   // { 'location' : { '$near' : [point.x, point.y], '$maxDistance' : distance}}
   List<Person> findByLocationNear(Point location, Distance distance);
@@ -361,7 +361,7 @@ Spring Data MongoDb supports geo-near queries, as the following example shows:
 
 [source,java]
 ----
-public interface PersonRepository extends MongoRepository<Person, String>
+public interface PersonRepository extends MongoRepository<Person, String> {
 
   // {'geoNear' : 'location', 'near' : [x, y] }
   GeoResults<Person> findByLocationNear(Point location);
@@ -388,7 +388,7 @@ By adding the `org.springframework.data.mongodb.repository.Query` annotation to
 
 [source,java]
 ----
-public interface PersonRepository extends MongoRepository<Person, String>
+public interface PersonRepository extends MongoRepository<Person, String> {
 
   @Query("{ 'firstname' : ?0 }")
   List<Person> findByThePersonsFirstname(String firstname);
@@ -404,7 +404,7 @@ You can also use the filter property to restrict the set of properties that is m
 
 [source,java]
 ----
-public interface PersonRepository extends MongoRepository<Person, String>
+public interface PersonRepository extends MongoRepository<Person, String> {
 
   @Query(value="{ 'firstname' : ?0 }", fields="{ 'firstname' : 1, 'lastname' : 1}")
   List<Person> findByThePersonsFirstname(String firstname);
@@ -455,7 +455,7 @@ to declare the predicate value for `lastname` (which is equivalent to the `?0` p
 
 [source,java]
 ----
-public interface PersonRepository extends MongoRepository<Person, String>
+public interface PersonRepository extends MongoRepository<Person, String> {
 
   @Query("{'lastname': ?#{[0]} }")
   List<Person> findByQueryWithExpression(String param0);
@@ -467,7 +467,7 @@ used in conjunction with JSON reveal a side-effect, because Map-like declaration
 
 [source,java]
 ----
-public interface PersonRepository extends MongoRepository<Person, String>
+public interface PersonRepository extends MongoRepository<Person, String> {
 
   @Query("{'id': ?#{ [0] ? {$exists :true} : [1] }}")
   List<Person> findByQueryWithExpressionAndNestedObject(boolean param0, String param1);