Conversion of see crefs to xrefs that contain backtick character is not working

Example: See file `xml/System.Linq/Queryable.xml` in https://github.com/dotnet/dotnet-api-docs/pull/8309/files?diff=split&w=1#commit-suggestions

This markdown is:
```
<see cref="T:System.Linq.IOrderedQueryable`1>
```

But should've been:
```
<xref:System.Linq.IOrderedQueryable`1>
```