doc: normalize Markdown code block info strings

Derek Lewis · codebytere · commit 6d25b5753a98 · 2020-06-18T09:45:16.000-07:00
Prior to this commit, Markdown fenced code blocks in Markdown files had inconsistent info strings. This has been corrected to standardize on the one shown in the CommonMark spec. Refs: https://github.com/commonmark/commonmark-spec/blob/1103710025f340702edcb070be41f9982b6544d5/spec.txt#L131 PR-URL: #33542 Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
diff --git a/doc/guides/releases.md b/doc/guides/releases.md
@@ -283,7 +283,7 @@ in the release branch (e.g. a release for Node.js v4 would be added to the
 
 The new entry should take the following form:
 
-```md
+```markdown
 <a id="x.y.x"></a>
 ## YYYY-MM-DD, Version x.y.z (Release Type), @releaser
 
diff --git a/tools/doc/README.md b/tools/doc/README.md
@@ -4,7 +4,7 @@ Here's how the node docs work.
 
 Each type of heading has a description block.
 
-```md
+```markdown
 # module
 
 <!--introduced_in=v0.10.0-->
