How to write pAttrList->add(XML_typeface, OString());

[Regina Henschel]

Hi all,

linux_clang_dbgutil_64 does not like

pAttrList->add(XML_typeface, OString());

and says, that I have to use std::string_view instead of OString.
But I don't know how to write it. Please help me.
It is in https://gerrit.libreoffice.org/c/core/+/152024

Kind regards,
Regina