it gets wrong fields when we replaced the comma with '|' in testing SSB data

**dataset:**
SSB test cases
[part.tar.gz](https://github.com/fwessels/simdcsv/files/7121229/part.tar.gz)


**reproduction:**
```
rd := simdcsv.NewReader(f)
rd.Comma = '|'
xs, err := rd.ReadAll()
```

**result:**

some lines can not be split righlty.