Only the list at the end, and I said so when I introduced it: Claude did the web search, I selected and edited the items and checked every link before posting.
I strive to write good prods and good prose. I hope careful writing does not become a sign of AI. 
Long answer for those who wants details
Here’s how I introduced it:
Just noticed the typos “to to” instead of “to do” an “personnally” instead of “personally”. AIs typically don’t do that. 
Why do you feel that?
I write my posts myself. I benefit from the forum, I try to share something thoughtful back… which easily becomes too long, so I cut it with Markdown sections and a TL;DR as a courtesy to readers. It is different from most people style but it’s my style, not any AI style.
I also have a discipline, before posting, of reading what I wrote “in the shoes of a reader passing by” and checking if it’s clear. Traditionally I would check for better words with a dictionary or sometimes Google translate one or two sentences. Nowadays when I think it’s not good enough I sometimes ask Claude to re-read, criticize and rewrite parts (which I did for example in my other post about “any-setup keys”).
Oh, plot twist ahead.
I just discovered that the dashes in that list (they mark date ranges) are not em dashes but en dashes, and according to En (typography) - Wikipedia that is the proper mark for a range. So it is correct typography. (Edit: but you were right on the main point: those dashes are in the part Claude produced.)
In the past I sometimes used -- (double-hyphen) when writing Markdown (here’s the result: – , also triple-hyphen yields: — ), IIRC because I read once on a typography geek site that those were more proper than the ASCII hyphen/minus sign in non-mathematical context. Now I don’t even consider it because it makes people believe an AI wrote the text.
As an exercise I asked Claude to rewrite the whole answer above. See its version below. That version is shorter. Mine has typos. 
Genuine question: would anyone prefer that I post Claude’s version next time?
What Claude suggests
Only the list at the end, and I said so when I introduced it: Claude did the web search, I selected and edited the items and checked every link I posted.
The rest is my own writing. My posts tend to be long, so I add section titles and a TL;DR as a courtesy to readers. That is my habit, not an AI’s.
Before posting, I re-read my text as a reader passing by would. I used to check words with a dictionary, or Google Translate for a sentence or two. Now, when a text is long and unclear, I sometimes ask Claude to re-read, criticize and rewrite parts. I did that in my other post about “any-setup keys”.
The dashes you spotted are in that list. They are en dashes in date ranges, which is standard typography. I used to type -- myself, because a typography site said it was more proper than a plain hyphen. I stopped, because now it makes people believe an AI wrote the text.
I strive to write good prods and good prose.