An interesting issue handling multi-bytes characters

[greenlaw110]

Refer to actframework/actframework#1213

When use nc directly:

Using nc with rlwrap:

It looks to me that rlwrap isn't counting the column width correctly for muti-bytes chars

[greenlaw110]

I have created a project to help reproduce this issue:

https://github.com/greenlaw110/rlwrap-issue

[hanslub42]

This has been high on my to-do list for some time, as it is a slightly embarrassing bug in 2019. rlwrap still uses good old strlen() to determine how wide a string will when displayed on your terminal, which yields an incorrect result when a multibyte character is displayed in one character cell in your locale.

My day job takes all my time at the moment, so this may take some time (this is a non-trivial project, simply replacing strlen() by some multi-byte aware version of it won't do the job)

[hanslub42]

This should be fixed by 46aadda