Fix various issues with "meta" docs in `projects/core/howto`

[khorn]

various issues:

• debug-with-emacs: pokey is missing, reinstate him

• glossary: Consider is the removal of the (currently broken) link from the "Spread" entry title: We could keep it as a link to core/howto/pb.html, which is titled "Overview Of Twisted Spread" and seems like a good place to send readers who want to learn more about Spread.

• upgrading: Looks good, but I noticed that under "Rebuild: Loading New Code Without Restarting", the API link is being removed from the first mention of Versioned (seemingly because it was broken?) But the second appearance of Versioned in that section has a working link to  http://twistedmatrix.com/documents/current/api/twisted.persisted.styles.Versioned.html; It seems like the first mention should link to the same place. Later mentions of both rebuild and Versioned aren't links, but that seems to be on purpose. (I'm guessing the pattern is that the first mention in a paragraph is a link and the rest aren't?)

[thijs]

Replying to khorn:

various issues: * debug-with-emacs: pokey is missing, reinstate him

I can see the image in my local version as well as  online?

* glossary: Consider is the removal of the (currently broken) link from the "Spread" entry title: We could keep it as a link to core/howto/pb.html, which is titled "Overview Of Twisted Spread" and seems like a good place to send readers who want to learn more about Spread.

Looks like this was fixed in r31099.

* upgrading: Looks good, but I noticed that under "Rebuild: Loading New Code Without Restarting", the API link is being removed from the first mention of Versioned (seemingly because it was broken?) But the second appearance of Versioned in that section has a working link to  http://twistedmatrix.com/documents/current/api/twisted.persisted.styles.Versioned.html; It seems like the first mention should link to the same place. Later mentions of both rebuild and Versioned aren't links, but that seems to be on purpose. (I'm guessing the pattern is that the first mention in a paragraph is a link and the rest aren't?)

Fixed in attached patch.

[jesstess]

Thanks for all your work on these documentation tickets, thijs.

Your changes look good to ship. While you're in that file, it'd be great if you could correct a few spelling errors:

• accomodate ==> accommodate
• compatiblity ==> compatibility
• compability ==> compatibility

Other than that, looks great, please merge.

[thijs]

(In [32228]) Apply versioned.2.patch: Add additional link for t.persisted.styles.Versioned and correct some typos.

Author: thijs Reviewer: jesstess Fixes: #4949