[Chen ERD] Allow empty entity or relationship on one-line (i.e. Without { and })

[The-Lum]

Context

To follow:

• Chen Notation for ER-diagrams #945
• Implement Chen Notation for ER-diagrams #1718
• [Chen ERD] Allow horizontal layout or left to right direction #1729

Wanted feature [for V1.2024.5+]

• Could you allow empty entity or relationship (or without any attribute) on one-line?
  (Without { and })

Example

@startchen

entity Person 
entity Location 
relationship Birthplace 

Person -N- Birthplace
Birthplace -1- Location

@endchen

As on Deployment diagram:

@startuml

entity Person
entity Location

card "on deployment diag."

@enduml

Or on Class;

@startuml

entity Person
entity Location

Class "on deployment diag."
hide empty members
@enduml

Regards,
Th.

[FYI @Benjamin-Davies]