Probably related to #216734 When pasting content with a regular double quote, e.g. this line: Test "test" test (do not select a trailing \n) and then pressing enter, WebKit converts this to: Test "test” test (notice that the last quote is converted to be a smart quote) I don't think that quotes should be converted in this manner, and instead quotes should only be converted immediately after they were typed. TextEdit and Pages exhibit the preferred behavior.
<rdar://problem/69318426>