...introduced with5d8f0fad50
"Adapt CPPUNIT_ASSERT to C++20 deleted ostream << for sal_Unicode (aka char16_t)" (see there for details) but erroneously removed with7bdbb50a50
"tdf#42949 Fix new IWYU warnings in directories c*" Change-Id: I32880a719525915f397fc65979265b67189ec604 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/105397 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <sbergman@redhat.com>