Add full content on blog RSS (#13815)

* Provide full content of blog posts in RSS

* Remove feed_ttl configuration for RSS because it is already the default

* Remove the pretty_print option of RSS feed to enable minification

---------

Co-authored-by: Mike Fiedler <[email protected]>

Author: osantana

docs/mkdocs-blog.yml

@@ -38,8 +38,7 @@ plugins:
       time_format: '%Y-%m-%d' # The format used to display the time
       meta_time_format: '%Y-%m-%d %H:%M' # The format used to parse the time from meta
   - rss:
-      abstract_chars_count: 160
-      abstract_delimiter: <!-- more -->
+      abstract_chars_count: -1
       categories:
         - tags
       date_from_meta:
@@ -49,10 +48,8 @@ plugins:
         default_timezone: "UTC"
         default_time: "06:09"
       enabled: true
-      feed_ttl: 1440
       image: https://blog.pypi.org/assets/logo.png
       length: 20
-      pretty_print: true
       match_path: "posts/.*"
 extra:
   homepage: https://pypi.org