Differences in label: syntax?

[stdedos]

For this diagram

```mermaid
flowchart LR
    List@{ shape: braces, label: "📋 List

    ☐ Step A
    ☑ Step B
    ☑ Step C
    ☐ Step D
    ☐ Step E
    ☐ Step F
    ☐ Step G" }
```

I want to add exactly one empty line between 📋 List and the steps.

All my attempts, however, give different results:

1. ```mermaid
   flowchart LR
       List@{ shape: braces, label: "📋 List
   
       ☐ Step A
       ☑ Step B
       ☑ Step C
       ☐ Step D
       ☐ Step E
       ☐ Step F
       ☐ Step G" }
   ```

   flowchart LR
       List@{ shape: braces, label: "📋 List
   
       ☐ Step A
       ☑ Step B
       ☑ Step C
       ☐ Step D
       ☐ Step E
       ☐ Step F
       ☐ Step G" }
   

   Loading

2. ```mermaid
   flowchart LR
       List@{ shape: braces, label: "📋 List<br>
   
       ☐ Step A
       ☑ Step B
       ☑ Step C
       ☐ Step D
       ☐ Step E
       ☐ Step F
       ☐ Step G" }
   ```

   flowchart LR
       List@{ shape: braces, label: "📋 List<br>
   
       ☐ Step A
       ☑ Step B
       ☑ Step C
       ☐ Step D
       ☐ Step E
       ☐ Step F
       ☐ Step G" }
   

   Loading

3. ```mermaid
   flowchart LR
       List@{ shape: braces, label: "📋 List<br><br>
   
       ☐ Step A
       ☑ Step B
       ☑ Step C
       ☐ Step D
       ☐ Step E
       ☐ Step F
       ☐ Step G" }
   ```

   flowchart LR
       List@{ shape: braces, label: "📋 List<br><br>
   
       ☐ Step A
       ☑ Step B
       ☑ Step C
       ☐ Step D
       ☐ Step E
       ☐ Step F
       ☐ Step G" }
   

   Loading

4. ```mermaid
   flowchart LR
       List@{ shape: braces, label: "📋 List
       <br>
       ☐ Step A
       ☑ Step B
       ☑ Step C
       ☐ Step D
       ☐ Step E
       ☐ Step F
       ☐ Step G" }
   ```

   flowchart LR
       List@{ shape: braces, label: "📋 List
       <br>
       ☐ Step A
       ☑ Step B
       ☑ Step C
       ☐ Step D
       ☐ Step E
       ☐ Step F
       ☐ Step G" }
   

   Loading

... except 3 and 4 (which both render 3 <br/>s)

I have looked at the help:

• There is no mentioning of label: parameter in shape:, and
• In https://mermaid.ai/open-source/syntax/flowchart.html#parameters of Icon Shape, it merely says label: The text label associated with the icon. This can be any string. If not defined, no label will be displayed. - without specifying what syntax the label: has.

According to Commonmark rules, a newline with an empty line is enough to generate a paragraph.

I am very new to Mermaid - so it might be mentioned somewhere else.

Thank you for your time and effort