[Bug 264237] csh or tcsh does not display emoji

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264237

            Bug ID: 264237
           Summary: csh or tcsh does not display emoji
           Product: Base System
           Version: 13.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: jszhao@yeah.net

Created attachment 234208
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=234208&action=edit
screenshot to demo the bug

Hi there,

I have run FreeBSD 13.1 RELEASE, and the default shell is csh, which is tcsh
actually, I think. I have a Chinese input method, which could input emoji. The
problem is when I input an emoji, for example: 🥰 after the csh prompt, it
displayed as: 

```
zjs@freebsd:~ % \U+1F970
🥰: Command not found.
```

The csh could display some emoji, for example: ❤️️

I have test the same input on the 44bsd-csh. It could give correct response.

Best,
Jinsong

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