Revert "fix: preserve parentheses for same-precedence different operators"

[f41gh7]

Reverts #67

---

Summary by cubic

Reverts the change that preserved parentheses for same-precedence different operators, restoring the previous expression formatting. This removes extra parens in printed queries (e.g., 100 * a / b) and simplifies binary-op parentheses logic.

• Removed associativity-based checks and the extra parameter from needBinaryOpArgParens.
• Updated tests and example outputs to reflect the original formatting.

^{Written for commit 67d1cff. Summary will update on new commits.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.71%. Comparing base (b60c155) to head (67d1cff).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #71      +/-   ##
==========================================
+ Coverage   89.67%   89.71%   +0.04%     
==========================================
  Files          11       11              
  Lines        3001     2996       -5     
==========================================
- Hits         2691     2688       -3     
+ Misses        211      210       -1     
+ Partials       99       98       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.