x86-assembly: update the article a bit

[mhorne]

Summary

Minor tweaks for consistency/readability. Actual content is not touched.

• Replace references to "chapter" with "article".
• Add a NOTE of the historical nature of the document.
• Clarify assemblers available on FreeBSD.
• List the trademarks used in the article, and reduce the (R) symbol usage. Per the Doc Primer, it only needs to be emitted with the first usage of the trademark.

[emaste]

documentation/content/en/articles/x86-assembly/_index.adoc

49

The comment in the first review states that it is "is still accurate" so I assume this chapter has some purpose still, and is not kept only for history. Should we expand this note somewhat to clarify the state/intent of this info?

85

There are a lot of potential updates you could make and I'm not going to suggest spending the effort on those extensive changes, but at least mentioning yasm would make sense to me.

314

not really true but reasonable to leave outside of the scope of your changes

[0mp]

LGTM. Next time let's keep simple changes like s/(R)//g in s separate commit. It's easier to review.