Fix issue901

[JSE19]

Description
Fixes broken markdown formatting and removes leftover AI assistant text in docs/DEVELOPMENT.md.
Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• 📚 Documentation update

Related Issues
Closes #901
Changes Made

• Removed stray ````md` opening fence at line 1 that wrapped the entire file in a broken code block
• Fixed mismatched 4-backtick close ( ) → 3-backtick close ( ` ``) on the clone repository code block
• Deleted trailing AI assistant chatter ("If you want next-level polish...") and an orphaned closing fence at end of file
  Testing
  Visual inspection — the file now renders cleanly without broken code blocks or assistant commentary.
  Checklist
• My code follows the project's style guidelines
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings