WordPress doesn't sanitize character ʼ (unicode U+02BC) when converting post title to slug

[ivanzhuck]

WordPress doesn't sanitize character ʼ (unicode U+02BC) when converting post title to slug

How to reproduce:

1. Create a post with title "Phʼnglui mglwʼnafh Cthulhu Rʼlyeh wgahʼnagl fhtagn"
2. Publish the post
3. The post gets slug "phʼnglui-mglwʼnafh-cthulhu-rʼlyeh-wgahʼnagl-fhtagn" instead of "phnglui-mglwnafh-cthulhu-rlyeh-wgahnagl-fhtagn"

[ashikur698]

Tried to recreate the same issue. The results are attached here
SC 1 - ​https://prnt.sc/Qc-iAbv4uiOA
SC 2 - ​https://prnt.sc/I64NUhsf-zO1

In SC 1, I copied the exact title and it seems like I successfully recreated the issue.

However, I tried to use the same character to recreate the issue like in SC 2. But it seems WordPress sanitizes the character just fine.

Maybe there's something going on with that exact text "Phʼnglui mglwʼnafh Cthulhu Rʼlyeh wgahʼnagl fhtagn".

Added apostrophe character codes to the list of symbols which must be stripped from post URL slug

It replaces characters:

ʼ (U+02BC);
ˮ (U+02EE);
՚ (U+055A);
ߴ (U+07F5);
ߵ (U+07F4);
＇ (U+FF07)

with empty string.