moved logdet for correct computation of logp #7751

[shanegladson]

Fix for bug outlined in #7751

Related Issue

• Closes #
• Related to BUG: PrecisionMvNormalRV missing factor of 1/2 for log determinant in logp function #7751

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Type of change

• New feature / enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

---

📚 Documentation preview 📚: https://pymc--7765.org.readthedocs.build/en/7765/

[welcome]

]
💖 Thanks for opening this pull request! 💖 The PyMC community really appreciates your time and effort to contribute to the project. Please make sure you have read our Contributing Guidelines and filled in our pull request template to the best of your ability.

[ricardoV94]

Can you add a test? If tau is a unit diagonal precision matrix the logp should match the save with the covariance logp