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I set up this duplicate line function: https://kundeveloper.com/blog/duplicate-line/

and bound it to the euro symbol like this:

(global-set-key (kbd "M-€") 'duplicate-line)

And it worked (for a while). On my keyboard, left alt + right alt + 4.

However, all of a sudden, when I restarted, it started to give me the following error:

enter image description here

error: M- must prefix a single character, not \342\202\254

and when I look in my init.el file, it also looks likes this

enter image description here

but if I copy that from init.el and paste it into stack overflow (as I did at the start of this question) I get the € back!

Does anybody know what I might have changed about my emacs or ubuntu to stop it accepting € as a key?

btw I still get this nice message when I try to use it:

enter image description here

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  • Have you changed your preferences related to the preferred coding system recently? I assume that's the cause of your problem. – user12563 Mar 16 '19 at 21:54
  • No, not that I know of – Alex028502 Mar 16 '19 at 22:06
  • Maybe you've changed your locale, or some update has. – user12563 Mar 16 '19 at 22:07
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I suggest you make sure that your locale (as set from where you launch Emacs) is a utf-8 locale. As a workaround you can also put ;; -*- coding: utf-8 -*- on the first line of your file. In Emacs-26, none of that should be needed because Elisp files are presumed to be utf-8 regardless of locale.

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  • I am using emacs 26. Not sure what changed. This worked great though. – Alex028502 Mar 17 '19 at 8:31

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