Update gitignore to the current provided by github

[mawildoer]

I noticed that .venv was missing from the .gitignore, so I went to add it, but figured I may as well update to the latest provided by Github in the process!

I "diffed" the two files with the following script to see what else to append to the bottom of github's template, then tidied up things that were caught more explicitly:

>>> with open('.gitignore') as f:
...   a = f.readlines()
... 
>>> with open('.gitignore2') as f:
...   b = f.readlines()
... 
>>> a = set(a)
>>> b = set(b)
>>> b-a
{'build/\n', 'eggs/\n', '.ipynb_checkpoints\n', '# SageMath parsed files\n', 'venv/\n', '*.manifest\n', '# poetry\n', '.scrapy\n', '#   commonly ignored for libraries.\n', 'downloads/\n', '#poetry.lock\n', '*$py.class\n', '# pdm\n', '#  and can be added to the global gitignore or merged into this file.  For a more nuclear\n', 'db.sqlite3\n', '# Environments\n', 'profile_default/\n', '#   For a library or package, you might want to ignore these files since the code is\n', '#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it\n', '.pybuilder/\n', '.pyre/\n', 'lib/\n', '# Distribution / packaging\n', '# Scrapy stuff:\n', '#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore\n', '.hypothesis/\n', 'instance/\n', '# PyCharm\n', 'celerybeat.pid\n', 'dist/\n', 'ENV/\n', '.venv\n', 'venv.bak/\n', '.webassets-cache\n', '#  option (not recommended) you can uncomment the following to ignore the entire idea folder.\n', '.spyderproject\n', 'env/\n', 'develop-eggs/\n', '# PyBuilder\n', '.pdm.toml\n', '.Python\n', "#   having no cross-platform support, pipenv may install dependencies that don't work, or not\n", '*.spec\n', '# Sphinx documentation\n', '*.egg-info/\n', '#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control\n', '# Pyre type checker\n', 'sdist/\n', '#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.\n', 'db.sqlite3-journal\n', 'lib64/\n', '*.sage.py\n', '#.idea/', '# .python-version\n', '# IPython\n', '#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can\n', '# Celery stuff\n', 'coverage.xml\n', '#   intended to run in multiple environments; otherwise, check them in:\n', '/site\n', '.pytest_cache/\n', '# Rope project settings\n', '.coverage.*\n', '# Byte-compiled / optimized / DLL files\n', '# pyenv\n', '#   in version control.\n', 'ipython_config.py\n', 'wheels/\n', '# mypy\n', '# mkdocs documentation\n', '# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm\n', '.tox/\n', 'env.bak/\n', '.nox/\n', '*.py,cover\n', '#  Usually these files are written by a python script from a template\n', '#  before PyInstaller builds the exe, so as to inject date/other infos into it.\n', '__pycache__/\n', 'target/\n', '#pdm.lock\n', '# Flask stuff:\n', 'dmypy.json\n', 'MANIFEST\n', '# pytype static type analyzer\n', 'parts/\n', '.ropeproject\n', '*.cover\n', '# pipenv\n', '#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.\n', '# PyInstaller\n', '#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.\n', '#   This is especially recommended for binary packages to ensure reproducibility, and is more\n', '.spyproject\n', 'cython_debug/\n', 'htmlcov/\n', 'cover/\n', '.dmypy.json\n', 'docs/_build/\n', '.pytype/\n', '# Cython debug symbols\n', 'pip-delete-this-directory.txt\n', '#   https://pdm.fming.dev/#use-with-ide\n', 'share/python-wheels/\n', '.env\n', 'var/\n', '__pypackages__/\n', '#   install all needed dependencies.\n', '.eggs/\n', 'local_settings.py\n', '.mypy_cache/\n', 'celerybeat-schedule\n', '# Django stuff:\n', '# Jupyter Notebook\n', '# Spyder project settings\n', '#Pipfile.lock\n', '*.pot\n', '#   However, in case of collaboration, if having platform-specific dependencies or dependencies\n'}
>>> for l in (a-b):
...   print(l)
... 

[devbisme]

I'm going through some long-neglected issues/PRs. I incorporated these changes. Not sure why it's not showing this. Closing it now.