lint: Document missing py_lint dependency

Also, change the linter name, needed for the next commit.

Author: MarcoFalke

test/lint/README.md

@@ -52,6 +52,7 @@ or `--help`:
 | [`lint-python-dead-code.py`](/test/lint/lint-python-dead-code.py) | [vulture](https://github.com/jendrikseipp/vulture)
 | [`lint-shell.py`](/test/lint/lint-shell.py) | [ShellCheck](https://github.com/koalaman/shellcheck)
 | [`lint-spelling.py`](/test/lint/lint-spelling.py) | [codespell](https://github.com/codespell-project/codespell)
+| `py_lint` | [ruff](https://github.com/astral-sh/ruff)
 | markdown link check | [mlc](https://github.com/becheran/mlc)
 
 In use versions and install instructions are available in the [CI setup](../../ci/lint/04_install.sh).

test/lint/test_runner/src/main.rs

@@ -36,9 +36,9 @@ fn get_linter_list() -> Vec<&'static Linter> {
             lint_fn: lint_markdown
         },
         &Linter {
-            description: "Check the default arguments in python",
-            name: "py_mut_arg_default",
-            lint_fn: lint_py_mut_arg_default,
+            description: "Lint Python code",
+            name: "py_lint",
+            lint_fn: lint_py_lint,
         },
         &Linter {
             description: "Check that std::filesystem is not used directly",
@@ -185,7 +185,7 @@ fn lint_subtree() -> LintResult {
     }
 }
 
-fn lint_py_mut_arg_default() -> LintResult {
+fn lint_py_lint() -> LintResult {
     let bin_name = "ruff";
     let checks = ["B006", "B008"]
         .iter()