minor formatting fixes

Author: vursen

articles/upgrading/index.adoc

@@ -351,7 +351,8 @@ The [classname]`GridArrayUpdater.UpdateQueueData` class has been removed, along
 * The [methodname]`setUpdateQueueData` method in [classname]`GridArrayUpdater` has been removed
 * The [methodname]`getUpdateQueueData` method in [classname]`GridArrayUpdater` has been removed
 * Parameters that included [classname]`UpdateQueueData` in their type have been removed from all [classname]`Grid` and [classname]`TreeGrid` constructors and methods:
-
++
+--
 [source,java,role="before"]
 ----
 protected <U extends GridArrayUpdater, B extends DataCommunicatorBuilder<T, U>> Grid(
@@ -365,7 +366,9 @@ protected <U extends GridArrayUpdater, B extends DataCommunicatorBuilder<T, U>>
     Class<T> beanType,
     B dataCommunicatorBuilder)
 ----
-
+--
++
+--
 [source,java,role="before"]
 ----
 protected GridArrayUpdater createDefaultArrayUpdater(
@@ -375,6 +378,7 @@ protected GridArrayUpdater createDefaultArrayUpdater(
 ----
 protected GridArrayUpdater createDefaultArrayUpdater()
 ----
+--
 
 The [classname]`TreeGridArrayUpdater` interface has also been removed. The [classname]`GridArrayUpdater` interface now handles both hierarchical and non-hierarchical updates.
 
@@ -389,9 +393,9 @@ The [classname]`HierarchicalDataCommunicator` class in Flow has been fully refac
 * The protected [methodname]`expand(T item, boolean syncClient)` method has been removed. Use the [methodname]`expand(T item)` method instead.
 * The public [methodname]`setRequestedRange` and [methodname]`setParentRequestedRange` methods have been merged into a single method [methodname]`setViewportRange(int start, int length)`. Instead of setting ranges separately for each level, this method sets a single range that operates on the flat list of items from all levels.
 * The public [methodname]`confirmUpdate(int id, String parentKey)` method has been removed. The [methodname]`confirmUpdate(int id)` method is now called instead.
-* The public [methodname]`getParentItem(T item)` method has been removed because it returned inconsistent results. Use the [classname]`HierarchicalDataProvider#getParent` method instead to get an item's parent reliably.
+* The public [methodname]`getParentItem(T item)` method has been removed because it didn't handle all cases correctly. Use the [classname]`HierarchicalDataProvider#getParent` method instead to get an item's parent reliably.
 * The public [methodname]`getIndex(T item)` and [methodname]`getParentIndex(T item)` methods have been removed for the same reason. To find an item's index reliably, use a combination of the [classname]`HierarchicalDataProvider#getItemIndex`, [classname]`HierarchicalDataProvider#getParent`, [classname]`HierarchicalDataCommunicator#buildQuery` methods as shown in the example below:
-
++
 [.example]
 --
 [source,java]