Support subgraph without title in flowchart

[copperybean]

Is your feature request related to a problem? Please describe. Sometimes I use subgraph to group a batch of nodes, I do not want to give it a title.

Describe the solution you'd like Currently, I can write a subgraph as following subgraph id [title] So is it possible to set empty title by empty brackets?

Describe alternatives you've considered None

Additional context

[bmsdubai]

As far I know, this should work ... try

subgraph identifier[" "]
   a --> b
end

flowchart TB
a --> b
subgraph id[" "]
  b --> c & d & e
end

[copperybean]

It works, tks

[flywire]

@copperybean close issue #3000

[omartrigui]

As far I know, this should work ... try

subgraph identifier[" "]
   a --> b
end

flowchart TB
a --> b
subgraph id[" "]
  b --> c & d & e
end

Doesn't work for multiple subgraphs. Alternatively, you can use &nbsp instead of identifier[" "], but neither option supports multiple subgraphs.

[edxu96]

As far I know, this should work ... try

subgraph identifier[" "]
   a --> b
end

flowchart TB
a --> b
subgraph id[" "]
b --> c & d & e
end

  flowchart TB

a --> b subgraph id[" "] b --> c & d & e end

Doesn't work for multiple subgraphs. Alternatively, you can use &nbsp instead of identifier[" "], but neither option supports multiple subgraphs.

You can use " ", " ", " ", and so on.