I forked leo and then cloned my fork and then attempted to switch to the devel branch and it failed.
Is there not a contributing section in the official docs that shows one how to get started?
cmd.exe shell transcript follows:
C:\code>git clone g...@github.com:metaperl/leo-editor.git
Cloning into 'leo-editor'...
remote: Enumerating objects: 200803, done.
remote: Counting objects: 100% (828/828), done.
remote: Compressing objects: 100% (247/247), done.
remote: Total 200803 (delta 603), reused 782 (delta 581), pack-reused 199975
Receiving objects: 100% (200803/200803), 214.89 MiB | 33.58 MiB/s, done.
Resolving deltas: 100% (158737/158737), done.
C:\code>cd leo-editor
C:\code\leo-editor>git checkout devel
error: pathspec 'devel' did not match any file(s) known to git
C:\code\leo-editor>
C:\code\leo-editor>dir
Volume in drive C is Windows-SSD
Volume Serial Number is 1C11-C7CE
Directory of C:\code\leo-editor
10/19/2022 01:07 PM <DIR> .
10/19/2022 01:05 PM <DIR> ..
10/19/2022 01:05 PM 512 .coveragerc
10/19/2022 01:05 PM 712 .gitattributes
10/19/2022 01:05 PM 2,329 .gitignore
10/19/2022 01:07 PM <DIR> .idea
10/19/2022 01:05 PM 2,897 .mypy.ini
10/19/2022 01:05 PM 48,406 ekr-spellpyx.txt
10/19/2022 01:05 PM 241,667 git-manifest.txt
10/19/2022 01:05 PM 145 launchLeo-console.py
10/19/2022 01:05 PM 167 launchLeo.py
10/19/2022 01:05 PM <DIR> leo
10/19/2022 01:05 PM 1,762 leo-commands.cfg
10/19/2022 01:05 PM 1,754 leo-core.cfg
10/19/2022 01:05 PM 1,760 leo-plugins.cfg
10/19/2022 01:05 PM 4,956 leo_to_html.xsl
10/19/2022 01:05 PM 1,789 LICENSE
10/19/2022 01:05 PM 977 MANIFEST.in
10/19/2022 01:05 PM 817 PKG-INFO.TXT
10/19/2022 01:05 PM 146 profileLeo.py
10/19/2022 01:05 PM 193 pyproject.toml
10/19/2022 01:05 PM 1,701 README.md
10/19/2022 01:05 PM 254 requirements.txt
10/19/2022 01:05 PM 899 run_pytest_tests.py
10/19/2022 01:05 PM 1,027 run_travis_unit_tests.py
10/19/2022 01:05 PM 99 setup.cfg
10/19/2022 01:05 PM 5,918 setup.py
10/19/2022 01:05 PM <DIR> tools
23 File(s) 320,887 bytes
5 Dir(s) 914,009,030,656 bytes free
C:\code\leo-editor>git checkout devel
error: pathspec 'devel' did not match any file(s) known to git
C:\code\leo-editor>git checkout master
Already on 'master'
M leo/doc/LeoDocs.leo
Your branch is up to date with 'origin/master'.
C:\code\leo-editor>