Address some copy editing issues

[fulldecent]

When opening a pull request to submit a new EIP, please use the suggested template: https://github.com/ethereum/EIPs/blob/master/eip-template.md

We have a GitHub bot that automatically merges some PRs. It will merge yours immediately if certain criteria are met:

• The PR edits only existing draft PRs.
• The build passes.
• Your GitHub username or email address is listed in the 'author' header of all affected PRs, inside .
• If matching on email address, the email address is the one publicly listed on your GitHub profile.

[eth-bot]

Hi! I'm a bot, and I wanted to automerge your PR, but couldn't because of the following issue(s):

---

(fail) eip-5732.md

classification
updateEIP

• eip-5732.md requires approval from one of (@xinbenlv, @mattstam)

[mattstam]

Looks good, thank you for this!

[xinbenlv]

Seems EIPW is complaining... Let me see if I could quickly fix it

[xinbenlv]

Suggested change

[xinbenlv]

Thank you @fulldecent for helping editing. I also fixes some copy editing pieces. and also addressed the question you brought up in the ethereum-magicians.org

[xinbenlv]

@fulldecent thanks for the PR, could you go ahead apply the suggested change and you shall be good to merge this PR. Or I am also happy to carry it out if you are bounded by bandwidth

[xinbenlv]

Hi @fulldecent thank you for the help. Since you didn't respond, I created a PR using your commits, incorporating my suggested edits. and becomes PR 5910 and PR 5909.

1. The editorial suggestions are accepted and incorporated.
2. The specification ambiguity about "STRICTLY INCREASING" is clarified.
3. The question that "secret_salt is unspecified" is clarified
4. The demo reference implementations are removed, the only one left is ENS's actual implementation.

By now I believe I've addressed all your feedbacks. Thank you very much!

For you and everyone else, please let me know if there are any other suggestions / feedback for this EIP before we finalize it

[xinbenlv]

With the above incorporations, feel free to close this PR.

[fulldecent]

@xinbenlv Thank you, all updated