[Jesse-njx]

Description of Changes

Locale.describe_multi() inserts its conjunction even when given only one timeframe. For example:

from arrow.locales import EnglishLocale

EnglishLocale().describe_multi([("hours", 2)])
# Before: "in and 2 hours"
# After:  "in 2 hours"

Only insert the conjunction when there are at least two formatted parts. Regression tests cover past and future values, only_distance=True and False, and continued use of and for two timeframes. The four single-timeframe cases fail on unchanged master and pass with the fix.

This corrects direct calls to the locale API. Arrow.humanize() already routes a single granularity through describe().

Validation

• Python 3.14.6 on macOS: 1,907 tests passed, 99.93% coverage.
• pre-commit run --all-files: all checks passed, including black, flake8, isort, and mypy.
• Documentation: doc8 passed; Sphinx HTML build with -W --keep-going passed.
• git diff --check: passed.

Pull Request Checklist

• Added tests for changed code.
• All tests pass when run locally.
• All linting checks pass when run locally.
• Code is up to date with the master branch.

No documentation changes are needed for this formatting correction.

AI assistance: OpenAI Codex (GPT-6) was used for source analysis, reproducing the bug, writing and reviewing the fix and tests, running validation, and drafting this PR. Validation was performed by the agent; no separate human review is claimed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (2224255) to head (9789fcd).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #1399   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
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  Files           10        10           
  Lines         2315      2315           
  Branches       358       358           
=========================================
  Hits          2315      2315           

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