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A QString constructed from a character literal of length 0, i.e. "", is not "null" for historical reasons. This does not matter here so use the preferred method isEmpty() instead. Also directly construct empty QString objects instead of passing in an empty character literal that has to be parsed into an empty object first. Signed-off-by: Rolf Eike Beer <eb@emlix.com> Link: https://doc.qt.io/qt-6/qstring.html#distinction-between-null-and-empty-strings Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>