Allow merge keyword take 2 or more branch names to draw an octopus merge

[oglops]

Proposal

Currently it can not visualize an octopus merge the best I could get is

gitGraph
    branch branch-A
    branch branch-B
    checkout branch-A
    commit
    commit
    commit
    checkout branch-B
    commit
    commit
    checkout main
    commit
    commit
    commit
    merge branch-A
    checkout main
    merge branch-B

Loading

but branch-A and branch-B do not merge at the same commit

Example

Make the synta support merge branch-A branch-B, and make it show an octopus merge

Screenshots

No response

[reactive-firewall]

Please implement this feature! This is one of the key features of git. GitHub's own octopus avatar is even a nod to this feature of git!