Add Jekyll 3.9.0 release post to main documentation

History.markdown

@@ -12,7 +12,6 @@
   * Update resources.md (#7864)
   * Extra apostrophes in an URL (#8319)
   * Clarify target of subordinate clause (#8320)
-  * [3.x] Add 3.9.0 release post (#8323)
 
 ### Development Fixes
 
@@ -25,7 +24,6 @@
 ### Bug Fixes
 
   * Replace nested conditional with guard clauses (#8294)
-  * [3.x] Add default language for kramdown syntax highlighting (#8325)
 
 ## 4.1.1 / 2020-06-24
 
@@ -220,6 +218,13 @@
 
   * Fix Kramdown converter based tests for v4.0.x (#8143)
 
+## 3.9.0 / 2020-08-05
+
+### Minor Enhancements
+
+* Allow use of kramdown v2 (#8322)
+* Add default language for kramdown syntax highlighting (#8325)
+
 ## 3.8.7 / 2020-05-08
 
 ### Bug Fixes

docs/_docs/history.md

@@ -212,6 +212,16 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Fix Kramdown converter based tests for v4.0.x ([#8143]({{ site.repository }}/issues/8143))
 
 
+## 3.9.0 / 2020-08-05
+{: #v3-9-0}
+
+### Minor Enhancements
+{: #minor-enhancements-v3-9-0}
+
+* Allow use of kramdown v2 ([#8322]({{ site.repository }}/issues/8322))
+* Add default language for kramdown syntax highlighting ([#8325]({{ site.repository }}/issues/8325))
+
+
 ## 3.8.7 / 2020-05-08
 {: #v3-8-7}
 

docs/_posts/2020-08-05-jekyll-3-9-0-released.markdown

@@ -0,0 +1,28 @@
+---
+title: 'Jekyll 3.9.0 Released'
+author: parkr
+version: 3.9.0
+categories: [release]
+---
+
+Jekyll 3.9.0 allows use of kramdown v2, the latest series of kramdown.
+
+If you choose to upgrade, please note that the GitHub-Flavored Markdown
+parser and other features of kramdown v1 are now distributed via
+separate gems. If you would like to continue using these features, you will
+need to add the gems to your `Gemfile`. They are as follows:
+
+- GFM parser – `kramdown-parser-gfm`
+- coderay syntax highlighter – `kramdown-syntax-coderay`
+- mathjaxnode math engine – `kramdown-math-mathjaxnode`
+- sskatex math engine – `kramdown-math-sskatex`
+- katex math engine – `kramdown-math-katex`
+- ritex math engine – `kramdown-math-ritex`
+- itex2mml math engine – `kramdown-math-itex2mml`
+
+Jekyll will require the given gem when the configuration requires it, and
+will show a helpful message when a dependency is missing.
+
+You can check out the patches and see all the details in [the release notes](/docs/history/#v3-9-0)
+
+Happy Jekylling!