raise headings level

articles/components/grid/selection.adoc

@@ -9,7 +9,7 @@ order: 40
 Grid supports single and multi-select modes. Neither is enabled by default.
 
 
-=== Single-Selection Mode
+== Single-Selection Mode
 
 In single-selection mode, the user can select and deselect rows by clicking anywhere on the row.
 
@@ -39,7 +39,7 @@ endif::[]
 --
 
 
-=== Multi-Select Mode
+== Multi-Select Mode
 
 In multi-select mode, the user can use a checkbox column to select and deselect more than one row -- not necessarily contiguous rows. Or the user can select all rows by clicking on the checkbox in the header row -- and then un-check the ones they don't want to be selected, rather than check many, individually.
 
@@ -100,15 +100,15 @@ selectionModel.setDragSelect(true);
 
 --
 
-=== Selection Modes in Flow
+== Selection Modes in Flow
 
 Each selection mode is represented by a [classname]`GridSelectionModel`, accessible through the [methodname]`getSelectionModel()` method, which can be cast that to the specific selection model type, [classname]`SingleSelectionModel` or [classname]`MultiSelectionModel`. These interfaces provide selection mode specific APIs for configuration and selection events.
 
 To use Grid with [classname]`Binder` in Flow, you can use [methodname]`asSingleSelect()` or [methodname]`asMultiSelect()`, depending on the currently defined selection mode. Both methods return interfaces that implement the [interfacename]`HasValue` interface for use with `Binder`.
 
 
 [role="since:com.vaadin:[email protected]"]
-=== Conditional Selection
+== Conditional Selection
 
 Grid allows you to configure a predicate to control which rows users may select or deselect. The predicate receives an item and must return `true` to allow selection -- `false` to prevent it. This doesn't, however, prohibit programmatic selection changes.