fix(docs): mmd detection

docs/README.md

@@ -49,7 +49,15 @@ In our release process we rely heavily on visual regression tests using [applito
 
 ### [Flowchart](./flowchart.md?id=flowcharts-basic-syntax)
 
-```mmd
+```mermaid-example
+graph TD;
+    A-->B;
+    A-->C;
+    B-->D;
+    C-->D;
+```
+
+```mermaid
 graph TD;
     A-->B;
     A-->C;
@@ -61,7 +69,21 @@ graph TD;
 
 ### [Sequence diagram](./sequenceDiagram.md)
 
-```mmd
+```mermaid-example
+sequenceDiagram
+    participant Alice
+    participant Bob
+    Alice->>John: Hello John, how are you?
+    loop Healthcheck
+        John->>John: Fight against hypochondria
+    end
+    Note right of John: Rational thoughts <br/>prevail!
+    John-->>Alice: Great!
+    John->>Bob: How about you?
+    Bob-->>John: Jolly good!
+```
+
+```mermaid
 sequenceDiagram
     participant Alice
     participant Bob
@@ -79,7 +101,20 @@ sequenceDiagram
 
 ### [Gantt diagram](./gantt.md)
 
-```mmd
+```mermaid-example
+gantt
+dateFormat  YYYY-MM-DD
+title Adding GANTT diagram to mermaid
+excludes weekdays 2014-01-10
+
+section A section
+Completed task            :done,    des1, 2014-01-06,2014-01-08
+Active task               :active,  des2, 2014-01-09, 3d
+Future task               :         des3, after des2, 5d
+Future task2               :         des4, after des3, 5d
+```
+
+```mermaid
 gantt
 dateFormat  YYYY-MM-DD
 title Adding GANTT diagram to mermaid
@@ -96,7 +131,24 @@ Future task2               :         des4, after des3, 5d
 
 ### [Class diagram](./classDiagram.md)
 
-```mmd
+```mermaid-example
+classDiagram
+Class01 <|-- AveryLongClass : Cool
+Class03 *-- Class04
+Class05 o-- Class06
+Class07 .. Class08
+Class09 --> C2 : Where am i?
+Class09 --* C3
+Class09 --|> Class07
+Class07 : equals()
+Class07 : Object[] elementData
+Class01 : size()
+Class01 : int chimp
+Class01 : int gorilla
+Class08 <--> C2: Cool label
+```
+
+```mermaid
 classDiagram
 Class01 <|-- AveryLongClass : Cool
 Class03 *-- Class04
@@ -145,7 +197,15 @@ Class08 <--> C2: Cool label
 
 ### [Entity Relationship Diagram - :exclamation: experimental](./entityRelationshipDiagram.md)
 
-```mmd
+```mermaid-example
+erDiagram
+    CUSTOMER ||--o{ ORDER : places
+    ORDER ||--|{ LINE-ITEM : contains
+    CUSTOMER }|..|{ DELIVERY-ADDRESS : uses
+
+```
+
+```mermaid
 erDiagram
     CUSTOMER ||--o{ ORDER : places
     ORDER ||--|{ LINE-ITEM : contains
@@ -157,7 +217,19 @@ erDiagram
 
 ### [User Journey Diagram](./user-journey.md)
 
-```mmd
+```mermaid-example
+journey
+    title My working day
+    section Go to work
+      Make tea: 5: Me
+      Go upstairs: 3: Me
+      Do work: 1: Me, Cat
+    section Go home
+      Go downstairs: 5: Me
+      Sit down: 5: Me
+```
+
+```mermaid
 journey
     title My working day
     section Go to work