Hash "#" symbol as prefix is not working for sequenceDiagram

[dav1tj]

Description

When we are using "#" has symbol as prefix in sequence diagram, text becomes empty.

Steps to reproduce

Try to use this code:
sequenceDiagram
actor Alice as #1
actor Bob as Bob
actor actor_sgautk7mz as New Actor

Note over Bob: #55
Bob -->> Bob: new msg
Alice ->> Bob: #66
Bob ->> Alice: Hi Alice

Screenshots

Code Sample

No response

Setup

• Mermaid version:
• Browser and Version: [Chrome, Edge, Firefox]

Suggested Solutions

No response

Additional Context

No response

[sidharthv96]

Hi @dav1tj, I think I know you from somewhere else ;)

These two PRs are related, major concern is breaking existing diagrams, so if that won't be an issue, we can have this.

• Allow Hashtags in Timeline Titles, Sections, and Events #5399
• Allow Semicolons in Timeline Titles, Sections, Periods, and Events #5335

Having # at the start of an id seems a bit odd(as it's usually not used, or used as a modifier in coding), what's the use case?