Misc Updates and bump to 3.8+

[Carreau]

• run ruff check and ruff format
• drop 3.8 (because we only test on 3.8+)
• test on 3.14
• apparently tempfile.NamedTemporaryFile is a function not a class for intersphinx

[Copilot]

Pull Request Overview

This PR applies code formatting updates using ruff check and ruff format, updates the minimum Python version requirement from 3.5 to 3.8, adds testing for Python 3.14, and corrects documentation to reflect that tempfile.NamedTemporaryFile is a function rather than a class for intersphinx.

Key changes:

• Applied consistent code formatting (double quotes, spacing) across all Python files
• Updated minimum Python version from 3.5 to 3.8 in pyproject.toml
• Added Python 3.14 and 3.14t to the test matrix

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/test_env.py	Reformatted string quotes and spacing
tests/test_commands.py	Reformatted string quotes, spacing, and replaced wildcard import with explicit imports
tests/test_asserts.py	Reformatted string quotes, spacing, and replaced wildcard import with explicit imports
testpath/tempdir.py	Fixed documentation reference from :class: to :func: for tempfile.NamedTemporaryFile and applied formatting
testpath/env.py	Applied formatting with consistent spacing between functions
testpath/commands.py	Reformatted string quotes, spacing, and formatting improvements
testpath/asserts.py	Reformatted string quotes, spacing, and improved multi-line list formatting
testpath/init.py	Replaced wildcard imports with explicit imports and applied formatting
pyproject.toml	Updated minimum Python version from 3.5 to 3.8
doc/conf.py	Reformatted string quotes and improved multi-line formatting
.github/workflows/test.yml	Added Python 3.14 and 3.14t to test matrix

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}