ER-attribute comments not work

[zhengwh]

Describe the bug

https://mermaid-js.github.io/mermaid/#/entityRelationshipDiagram?id=attribute-keys-and-comments

Attribute Keys and Comments
Attributes may also have a key or comment defined. Keys can be "PK" or "FK", for Primary Key or Foreign Key. And a comment is defined by quotes at the end of an attribute. Comments themselves cannot have quote characters in them.

but actually it is not work. when i add comments ,the attribute will be hidden in the render graph

[linde12]

Can confirm. No way to comment and no other way to mark a field as optional/nullable.

As a side note the use of the "PK" or "FK" keys have the same problem as comments!

[ghost]

N.B. this (if course) affects https://mermaid.live/

[mi-kra]

Column name can't start with "pk", for example:

CUSTOMER {
    string name
    string pkcustNumber
    string sector 
}

it seems to be related problem to above.