Fix typos in reference documentation and Javadoc.

Signed-off-by: Seungrae Kim <obey1342@gmail.com>

Closes #3235

Author: Seungpang

src/main/antora/modules/ROOT/pages/entity-callbacks.adoc

@@ -40,7 +40,7 @@ public interface BeforeSaveCallback<T> extends EntityCallback<T> {
 		String collection); // <3>
 }
 ----
-<1> `BeforeSaveCallback` specific method to be called before an entity is saved. Returns a potentially modifed instance.
+<1> `BeforeSaveCallback` specific method to be called before an entity is saved. Returns a potentially modified instance.
 <2> The entity right before persisting.
 <3> A number of store specific arguments like the _collection_ the entity is persisted to.
 

src/main/antora/modules/ROOT/pages/object-mapping.adoc

@@ -103,7 +103,7 @@ class Person {
   }
 
   Person withId(Long id) {
-    return new Person(id, this.firstname, this.lastame);
+    return new Person(id, this.firstname, this.lastname);
   }
 
   void setLastname(String lastname) {

src/main/antora/modules/ROOT/pages/repositories/scrolling.adoc

@@ -76,9 +76,9 @@ WindowIterator<User> users = WindowIterator.of(position -> repository.findFirst1
 
 [CAUTION]
 ====
-There is a difference between `ScollPosition.offset()` and `ScollPosition.offset(0L)`.
+There is a difference between `ScrollPosition.offset()` and `ScrollPosition.offset(0L)`.
 The former indicates the start of scroll operation, pointing to no specific offset whereas the latter identifies the first element (at position `0`) of the result.
-Given the _exclusive_ nature of scrolling, using `ScollPosition.offset(0)` skips the first element and translate to an offset of `1`.
+Given the _exclusive_ nature of scrolling, using `ScrollPosition.offset(0)` skips the first element and translate to an offset of `1`.
 ====
 
 [[repositories.scrolling.keyset]]

src/main/java/org/springframework/data/repository/core/support/TransactionalRepositoryProxyPostProcessor.java

@@ -82,7 +82,7 @@ public void postProcess(ProxyFactory factory, RepositoryInformation repositoryIn
 	}
 
 	/**
-	 * Custom implementation of {@link AnnotationTransactionAttributeSource} that that slightly modify the algorithm
+	 * Custom implementation of {@link AnnotationTransactionAttributeSource} that slightly modify the algorithm
 	 * transaction configuration is discovered.
 	 * <p>
 	 * The original Spring implementation favors the implementation class' transaction configuration over one declared at