Line breaks are not rendered correctly in class diagrams

[LucasHaug]

Description

When using \n in class diagrams, the line break is not rendered, the \n symbol is rendered instead.

The issue #1745 was closed some time ago, but the solution is no longer valid.

Steps to reproduce

The following two diagrams can be used to reproduce the error in version 11.4.0:

Diagram from the issue #1745:

classDiagram
    DuOamBaseMsgHandler : # uint8_t m_phyId
    DuOamBaseMsgHandler : # string m_moduleName
    DuOamBaseMsgHandler : # weak_ptr m_ptrDuPlaneDataStore
    DuOamBaseMsgHandler : # shared_ptr m_ptrDataTree
    DuOamBaseMsgHandler : # int32_t m_initStatus
    DuOamBaseMsgHandler: + virtual ~DuOamBaseMsgHandler()
    DuOamBaseMsgHandler: + someFunction()
    DuOamBaseMsgHandler: + DuOamBaseMsgHandler(const uint8_t& ccId, \n const string_view moduleName, \n weak_ptr ptrDuMplaneDataStore)
    DuOamBaseMsgHandler: + someFunction()

Diagram from the mermaid class diagram documentation:

---
title: Animal example
---
classDiagram
    note "From Duck till Zebra"
    Animal <|-- Duck
    note for Duck "can fly\ncan swim\ncan dive\ncan help in debugging"
    Animal <|-- Fish
    Animal <|-- Zebra
    Animal : +int age
    Animal : +String gender
    Animal: +isMammal()
    Animal: +mate()
    class Duck{
        +String beakColor
        +swim()
        +quack()
    }
    class Fish{
        -int sizeInFeet
        -canEat()
    }
    class Zebra{
        +bool is_wild
        +run()
    }

Screenshots

Screenshot for the diagram from the issue #1745 in mermaid live:

Screenshot for the diagram from the documentation:

Code Sample

No response

Setup

• Mermaid Live:

  • Version: 11.4.0
  • Edge: Version 131.0.2903.112 (Official build) (64-bit)
  • Chrome: Version 131.0.6778.204 (Official Build) (64-bit)
  • Firefox: 133.0.3 (64-bit)

• Mermaid CLI docker:

  • Image: ghcr.io/mermaid-js/mermaid-cli/mermaid-cli:11.4.3-beta.2

Suggested Solutions

No response

Additional Context

No response

[LucasHaug]

I investigated this a little bit more using the docker images, and from what I've seen, the line break stopped working in the following version minlag/mermaid-cli:11.2.2-beta.6, when using minlag/mermaid-cli:11.2.2-beta.5 the line breaks still work.