#425

backend/app/services/tag_group_markdown_renderer.rb

@@ -15,7 +15,9 @@ class TagGroupMarkdownRenderer
     placements = @group.fetch('placements')
     validate_membership!(placements)
     blocks = []
-    blocks << clean_text(@group['description']) if @group['description'].present?
+    if @group['description'].present?
+      blocks << clean_text(@group['description'])
+    end
 
     sections = placements.select { _1.key?('section_name') }
     if sections.any? && sections.size != placements.size
@@ -24,7 +26,7 @@ class TagGroupMarkdownRenderer
     end
 
     if placements.all? { _1.key?('section_name') }
-      blocks.concat(placements.map { render_heading(_1, 1) })
+      blocks.concat(placements.map { render_heading(_1, 2) })
     else
       blocks << render_list(placements, 0)
     end
@@ -36,15 +38,17 @@ class TagGroupMarkdownRenderer
 
   def validate_membership! placements
     placed = placement_members(placements).uniq.sort
-    members = @group.fetch('members').map do |member|
+    members = @group.fetch('members').map { |member|
       if member['tag']
         ['tag', member.fetch('tag').fetch('id')]
       else
         ['tag_group', member.fetch('tag_group').fetch('id')]
       end
-    end.uniq.sort
+    }.uniq.sort
     missing = members - placed
-    raise UnsupportedStructure, '掲載位置のない membership は Markdown にできません．' if missing.any?
+    if missing.any?
+      raise UnsupportedStructure, '掲載位置のない membership は Markdown にできません．'
+    end
   end
 
   def placement_members nodes