correct documentation, sf#2186611
correct documentation, sf#2186611

std::vector::at() throws std::out_of_range and not std::invalid_argument

freedesktop-unofficial-mirror/libreoffice__cppunit,LesleyLai/cppunit,freedesktop-unofficial-mirror/libreoffice__cppunit,LesleyLai/cppunit,ryancalhoun/cppunit,freedesktop-unofficial-mirror/libreoffice__cppunit,ryancalhoun/cppunit,LesleyLai/cppunit,project-zerus/cppunit,project-zerus/cppunit,ryancalhoun/cppunit,project-zerus/cppunit,freedesktop-unofficial-mirror/libreoffice__cppunit,ryancalhoun/cppunit,LesleyLai/cppunit