GitGraph: allow branch names starting with "branch"

[DanySK]

Describe the bug

Git allows dashes and slashes to be used as branch names.
Currently, mermaid.js renders them in the main branch, but does not allow to checkout or create branches with these valid names.

To Reproduce

see the remainder of the report

Expected behavior

All the following charts work

Screenshots

see code samples

Code Sample
If applicable, add the code sample or a link to the live editor.

Working case

%%{init: { 'gitGraph': { 'mainBranchName': 'branch1'}} }%%
gitGraph
  commit
  commit
  commit
  branch branch2
  commit
  checkout branch1
  commit
  checkout branch2
  commit

%%{init: { 'gitGraph': { 'mainBranchName': 'branch1'}} }%%
gitGraph
  commit
  commit
  commit
  branch branch2
  commit
  checkout branch1
  commit
  checkout branch2
  commit

Loading

New branch name with dash

%%{init: { 'logLevel': 'debug', 'gitGraph': { 'mainBranchName': 'default-branch'}} }%%
gitGraph
  commit
  commit
  commit
  branch branch-2
  commit
  checkout default-branch
  commit
  checkout branch-2
  commit

%%{init: { 'logLevel': 'debug', 'gitGraph': { 'mainBranchName': 'default-branch'}} }%%
gitGraph
  commit
  commit
  commit
  branch branch-2
  commit
  checkout default-branch
  commit
  checkout branch-2
  commit

Loading

New branch name with slash

%%{init: { 'logLevel': 'debug', 'gitGraph': { 'mainBranchName': 'default-branch'}} }%%
gitGraph
  commit
  commit
  commit
  branch branch/b2
  commit
  checkout default-branch
  commit
  checkout branch/b2
  commit

%%{init: { 'logLevel': 'debug', 'gitGraph': { 'mainBranchName': 'default-branch'}} }%%
gitGraph
  commit
  commit
  commit
  branch branch/b2
  commit
  checkout default-branch
  commit
  checkout branch/b2
  commit

Loading

[aloisklink]

Hi, dashes and slashes work in Mermaid v9.1.0 or later, thanks to #2954.

However, branch names cannot start with branch (it's a reserved keyword in the parser).

The examples you give work fine, as long as I rename the branch to bran:

New branch name with dash

%%{init: { 'logLevel': 'debug', 'gitGraph': { 'mainBranchName': 'default-branch'}} }%%
gitGraph
  commit
  commit
  commit
  branch branc-2
  commit
  checkout default-branch
  commit
  checkout branc-2
  commit

%%{init: { 'logLevel': 'debug', 'gitGraph': { 'mainBranchName': 'default-branch'}} }%%
gitGraph
  commit
  commit
  commit
  branch branc-b2
  commit
  checkout default-branch
  commit
  checkout branc-b2
  commit

Loading

New branch name with slash

%%{init: { 'logLevel': 'debug', 'gitGraph': { 'mainBranchName': 'default-branch'}} }%%
gitGraph
  commit
  commit
  commit
  branch branc/b2
  commit
  checkout default-branch
  commit
  checkout branc/b2
  commit

%%{init: { 'logLevel': 'debug', 'gitGraph': { 'mainBranchName': 'default-branch'}} }%%
gitGraph
  commit
  commit
  commit
  branch branc/b2
  commit
  checkout default-branch
  commit
  checkout branc/b2
  commit

Loading