Merge branch 'develop' into sidv/removeWebpackBabel

* develop:
  chore: update browsers list
  Support EMPTYSTR in jison parser, add unit tests for git graph parser
  Use undefined to mean default tagging behavior
  feat(git): allow cherry-pick to suppress tag altogether
  Update src/diagrams/git/parser/gitGraph.jison
  fix(git): fix cherry-pick regex parsing error
  test(git): add basic parsing test for cherry-pick
  feat(git): cherry-pick keyword supports tag attribute
  Test docs:verify
  Cleanup docs
  Fixed Linting issues

docs/classDiagram.md

@@ -660,14 +660,27 @@ It is also possible to attach a class to a list of nodes in one statement:
 
 A shorter form of adding a class is to attach the classname to the node using the `:::` operator:
 
-```mmd
+```mermaid-example
+classDiagram
+    class Animal:::cssClass
+```
+
+```mermaid
 classDiagram
     class Animal:::cssClass
 ```
 
 Or:
 
-```mmd
+```mermaid-example
+classDiagram
+    class Animal:::cssClass {
+        -int sizeInFeet
+        -canEat()
+    }
+```
+
+```mermaid
 classDiagram
     class Animal:::cssClass {
         -int sizeInFeet