Use four spaces in frontmatter blocks

source/_daily_emails/2023-12-05.md

@@ -1,15 +1,15 @@
 ---
 title: >
-  Open-source encourages more open-source
+    Open-source encourages more open-source
 pubDate: 2023-12-05
 permalink: >-
-  archive/2023/12/05/open-source-encourages-open-source
+    archive/2023/12/05/open-source-encourages-open-source
 tags:
-  - software-development
-  - contribution
-  - open-source
-  - drupal
-  - php
+    - software-development
+    - contribution
+    - open-source
+    - drupal
+    - php
 ---
 
 [In yesterday's email][yesterday], I mentioned the Private Message Queue module - a contributed Drupal module we wrote for a project as part of a contribution-first workflow.