simply go to https://www.amazon.com/sendtokindle.
Some characters - like quotes, backticks, etc. - are being shown like ’
Reason: the encoding is not explicitly configured as UTF-8.
I learned about this in this article.
Open Calibre and then go to: Preferences -> Get plugins to enhance calibre
In the popup, search for Modify ePub
and install it.
Once installed, run it for the book you're having problems with, and enable Encode HTML in UTF-8
.