When the format is an ASCII string, there's no point widening it to
UTF-16 before the actual formatting step. Also, don't construct the
format string using string arithmetic, when passing another parameter
to arg() will do just as well. In the process, restructured
generic_data(), split long lines and conform spacing to Qt coding
style on affected lines. Simplified initialization of two string
fragments by using QL1S instead of QString, too.
Change-Id: Ib101dcf9296cc532291518bcef8e0a8de597b8a0
Reviewed-by: Marc Mutz <marc.mutz@qt.io>