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  > See explanation Yuri Khan has made earlier.  My package, like said in
  > comment, makes a request for a URL produced by concatenation of
  > shorten-url-base with a URL passed as an argument and inserts data returned
  > in response in current buffer.  It's up to web server to produce shortened
  > URL.

I don't entirely follow that.  Are you saying that your code does
contact the abbreviation server to define the shortened URL?  If so,
it makes sense.

--
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)