KM9 did make a change to the Percent Encode URL
Adjusted Filter Percent Encode for URL to encode all non-alphanumeric characters.
According to HTML URL Encoding Reference
URL Encoding (Percent Encoding)
URLs can only be sent over the Internet using the ASCII character-set.
Since URLs often contain characters outside the ASCII set, the URL has to be converted into a valid ASCII format.
URL encoding replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits.
URLs cannot contain spaces. URL encoding normally replaces a space with a plus (+) sign or with %20.
So the w3schools spec calls for encoding non-ASCII characters.
KM9 spec calls for encoding non-alphanumeric characters.
Here is perhaps a better spec:
Percent-encoding - MDN Web Docs Glossary: Definitions of Web-related terms | MDN
I guess the question is what does @peternlewis mean by "non-alphanumeric characters"? Is that the same as "non-ASCII"?
@andreamocko, IAC, while there has been a change, is KM9 now providing the proper conversion from your POV?