Polish asciidoc generated by changelog generator

Refine the generator so that an additional space is included after
section titles.

Author: philwebb

spring-boot-project/spring-boot-tools/spring-boot-configuration-metadata-changelog-generator/src/main/java/org/springframework/boot/configurationmetadata/changelog/ChangelogWriter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,11 +68,11 @@ void write(Changelog changelog) {
 		String newVersionNumber = changelog.newVersionNumber();
 		Map<DifferenceType, List<Difference>> differencesByType = collateByType(changelog);
 		write("Configuration property changes between `%s` and `%s`%n", oldVersionNumber, newVersionNumber);
-		write("%n%n%n== Deprecated in %s%n", newVersionNumber);
+		write("%n%n%n== Deprecated in %s%n%n", newVersionNumber);
 		writeDeprecated(differencesByType.get(DifferenceType.DEPRECATED));
-		write("%n%n%n== Added in %s%n", newVersionNumber);
+		write("%n%n%n== Added in %s%n%n", newVersionNumber);
 		writeAdded(differencesByType.get(DifferenceType.ADDED));
-		write("%n%n%n== Removed in %s%n", newVersionNumber);
+		write("%n%n%n== Removed in %s%n%n", newVersionNumber);
 		writeRemoved(differencesByType.get(DifferenceType.DELETED), differencesByType.get(DifferenceType.DEPRECATED));
 	}
 

spring-boot-project/spring-boot-tools/spring-boot-configuration-metadata-changelog-generator/src/test/resources/sample.adoc

@@ -3,11 +3,13 @@ Configuration property changes between `1.0` and `2.0`
 
 
 == Deprecated in 2.0
+
 _None_.
 
 
 
 == Added in 2.0
+
 |======================
 | Key | Default value | Description
 
@@ -19,6 +21,7 @@ _None_.
 
 
 == Removed in 2.0
+
 |======================
 | Key | Replacement | Reason