Move Git Best Practices from section 10 to section 5, placing it after
Pull Requests and before Versioning. This positions best practices for
commits, rebasing, and force-pushing earlier in the document where they
are more relevant to daily development work.
- Renumber sections 5-9 to 6-10
- Update cross-reference in section 7.2 (section 5.1 → 6.1)
- Normalize "Long-term" to "Long-Term" for consistency