Match float zero-division message with CPython

[moreal]

This pull request lets RustPython raise zero-division error with same message with CPython.

# testfile.py
for op in ("//", "/", "%"):
    try:
        eval(f"1.{op}0.")
        print(op, "No Error")
    except Exception as e:
        print(op, "Error", e)

# before this pull request (073adbd8d): cargo run --release -q -- testfile.py
// Error float floordiv by zero
/ Error float division by zero
% Error float mod by zero

# on this pull request: cargo run --release -q -- testfile.py
// Error division by zero
/ Error division by zero
% Error division by zero

# python 3.14.3: python3 -- testfile.py
// Error division by zero
/ Error division by zero
% Error division by zero

Summary by CodeRabbit

• Bug Fixes
  • Float division-by-zero error messages now display consistently across all division operations (division, modulo, floor division, and divmod).

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Review profile: CHILL

Plan: Pro

Run ID: a0acab0d-7b16-4e8e-b958-b7bc2b04e70d

📥 Commits

Reviewing files that changed from the base of the PR and between ed032d3 and 6f7a621.

⛔ Files ignored due to path filters (1)

• Lib/test/test_builtin.py is excluded by !Lib/**

📒 Files selected for processing (1)

• crates/vm/src/builtins/float.rs

---

📝 Walkthrough

Walkthrough

Error messages for float division operations are standardized to use "division by zero" consistently across inner_div, inner_mod, inner_floordiv, and inner_divmod functions, replacing operation-specific prefixes in diagnostic output.

Changes

Cohort / File(s)	Summary
Float Division Error Messages crates/vm/src/builtins/float.rs	Standardized error messages for division-by-zero conditions across four float operations by removing operation-specific prefixes ("float division by zero" → "division by zero").

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested reviewers

• youknowone

Poem

🐰 When floats must divide, no more confusion—
Just "division by zero," a clear conclusion!
Four functions now speak with one voice so clear,
Error messages harmonized, beautiful and sincere! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: aligning RustPython's float zero-division error messages with CPython's behavior.

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[github-actions]

📦 Library Dependencies

The following Lib/ modules were modified. Here are their dependencies:

[x] test: cpython/Lib/test/test_builtin.py (TODO: 18)

dependencies:

dependent tests: (no tests depend on builtin)

[ ] test: cpython/Lib/test/test_decorators.py (TODO: 1)

dependencies:

dependent tests: (no tests depend on decorators)

[ ] test: cpython/Lib/test/test_marshal.py (TODO: 21)

dependencies:

dependent tests: (21 tests)

• marshal: test_bool test_exceptions test_importlib test_inspect test_marshal test_zipimport
  • importlib._bootstrap_external: test_importlib test_unittest
    • modulefinder: test_importlib test_modulefinder
    • py_compile: test_argparse test_cmd_line_script test_compileall test_importlib test_multiprocessing_main_handling test_py_compile test_pydoc test_runpy
    • pydoc: test_enum
  • pkgutil: test_pkgutil
  • zipimport: test_importlib

Legend:

• [+] path exists in CPython
• [x] up-to-date, [ ] outdated