# Why might providing contact information be considered spam?

My (now changed) answer to the question,"Why is $PV^γ$ constant in an adiabatic process?" received the following comment:

1. You do not need to "archive" the question in your answer, that's what the revision history is for. 2. Suggesting people contact you at your website in an answer is inappropriate, and your repeated pattern of doing so borders on spam. Please stop doing this. 3. Information like pointing OP formatting help should be done in comments not answers - answers should contain solely information pertaining to the actual question posed. – ACuriousMind♦ 18 mins ago
1. What is he trying to say?
2. What site policies is he referring to?

I am no longer able to update my answer there (currently locked out), getting the following message from his actions:

Is this answer really spam-like; if so, why; if not, what can be done to allow me to once more edit the question?

# Post-Script:

I found the following HTML formatting link to be very useful for general formatting. And this equation formatting link was also very helpful. Thank you Physics Stack Exchange!

• Your copy of the answer here has an added paragraph on "Sterling Engines" [sic] that wasn't in the answer you wrote originally. Is this added paragraph intentional? The way the question is written makes it seem as if you're saying this paragraph was in the original answer. – GPhys Jun 25 '17 at 10:40
• The site maintains a full revision history of all questions and answers, so there is no need to "archive" the original post here. Accordingly, I've edited it out. – David Z Jun 25 '17 at 10:59
• You can see what this revision history looks like by clicking the "edited X time ago" link to the left of the post author card. That edit history link shows the identity of the most recent reviser, if the reviser is a different user than the post's original author. – rob Jun 25 '17 at 13:40