[hb]: Update instructions to update from source

[fernape]

Summary

Add instructions to delete old files and libraries as documented in the top
level Makefile of src.

Test Plan

• Apply patch
• make run
• Access localhost:1313 and inspect the relevant section of the handbook

[fernape]

Fix typo

[jhb]

documentation/content/en/books/handbook/cutting-edge/_index.adoc

738

This is fine (and matches UPDATING)

740

I don't think we want to add this blindly. In UPDATING, the comment for make delete-old mentions make delete-old-libs and explains when it is safe to run. I think you should mirror that arrangement here.

764

[fernape]

documentation/content/en/books/handbook/cutting-edge/_index.adoc

764

Isn't this warning the same as the comment in line 768 for make delete-old-libs

[fernape]

• [hb]: Warn about blindly removing old libraries
  
  As suggested by jhb@

[jhb]

documentation/content/en/books/handbook/cutting-edge/_index.adoc

764

I pulled this text directly from src/UPDATING from footnote 6 at the end of the file where it talks about this same general topic (general steps for upgrading from source)

[fernape]

documentation/content/en/books/handbook/cutting-edge/_index.adoc

764

The bullet list already has the warning (rephrased, more compact) and then the description list also includes a similar clarification.
I'm not sure if you mean that in the bullet list you want the whole comment.

Thanks!