Merge pull request #5640 from ScriptBloom/docs/5639_optimize-state-di…

…agram-example-display

docs: fix the classDef example in stateDiagram not display as code block, and long text display overflows

docs/syntax/stateDiagram.md

@@ -483,8 +483,8 @@ a _[valid CSS property name](https://www.w3.org/TR/CSS/#properties)_ followed by
 
 Here is an example of a classDef with just one property-value pair:
 
-```
-    classDef movement font-style:italic;
+```txt
+classDef movement font-style:italic;
 ```
 
 where
@@ -496,8 +496,8 @@ If you want to have more than one _property-value pair_ then you put a comma (`,
 
 Here is an example with three property-value pairs:
 
-```
-    classDef badBadEvent fill:#f00,color:white,font-weight:bold,stroke-width:2px,stroke:yellow
+```txt
+classDef badBadEvent fill:#f00,color:white,font-weight:bold,stroke-width:2px,stroke:yellow
 ```
 
 where
@@ -522,7 +522,7 @@ There are two ways to apply a `classDef` style to a state:
 A `class` statement tells Mermaid to apply the named classDef to one or more classes. The form is:
 
 ```txt
-    class [one or more state names, separated by commas] [name of a style defined with classDef]
+class [one or more state names, separated by commas] [name of a style defined with classDef]
 ```
 
 Here is an example applying the `badBadEvent` style to a state named `Crash`:

packages/mermaid/src/docs/syntax/stateDiagram.md

@@ -288,8 +288,8 @@ a _[valid CSS property name](https://www.w3.org/TR/CSS/#properties)_ followed by
 
 Here is an example of a classDef with just one property-value pair:
 
-```
-    classDef movement font-style:italic;
+```txt
+classDef movement font-style:italic;
 ```
 
 where
@@ -301,8 +301,8 @@ If you want to have more than one _property-value pair_ then you put a comma (`,
 
 Here is an example with three property-value pairs:
 
-```
-    classDef badBadEvent fill:#f00,color:white,font-weight:bold,stroke-width:2px,stroke:yellow
+```txt
+classDef badBadEvent fill:#f00,color:white,font-weight:bold,stroke-width:2px,stroke:yellow
 ```
 
 where
@@ -327,7 +327,7 @@ There are two ways to apply a `classDef` style to a state:
 A `class` statement tells Mermaid to apply the named classDef to one or more classes. The form is:
 
 ```txt
-    class [one or more state names, separated by commas] [name of a style defined with classDef]
+class [one or more state names, separated by commas] [name of a style defined with classDef]
 ```
 
 Here is an example applying the `badBadEvent` style to a state named `Crash`: