Migrate to Asciidoctor Tabs

spring-shell-docs/modules/ROOT/pages/using-shell-components-ui-singleselect.adoc

@@ -6,12 +6,10 @@ ifndef::snippets[:snippets: ../../test/java/org/springframework/shell/docs]
 A single select component asks a user to choose one item from a list. It is similar to a simple
 dropbox implementation. The following listing shows an example:
 
-====
 [source, java, indent=0]
 ----
 include::{snippets}/UiComponentSnippets.java[tag=snippet6]
 ----
-====
 
 The following image shows typical output for a single select component:
 
@@ -38,9 +36,7 @@ You can pre-select an item by defining it to get exposed. This is
 useful if you know the default and lets the user merely press `Enter` to make a choice.
 The following listing sets a default:
 
-====
 [source, java, indent=0]
 ----
 include::{snippets}/UiComponentSnippets.java[tag=snippet8]
 ----
-====