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Incrementing the level of the call stack reported is useful for debugging purposes as it allows to control which part of the test is exactly failing, especially if a test is structured with subroutines that call routines from Test::More. This adds more incrementations of $Test::Builder::Level where debugging gets improved (for example it does not make sense for some paths like pg_rewind where long subroutines are used). A note is added to src/test/perl/README about that, based on a suggestion from Andrew Dunstan and a wording coming from both of us. Usage of Test::Builder::Level has spread in 12, so a backpatch down to this version is done. Reviewed-by: Andrew Dunstan, Peter Eisentraut, Daniel Gustafsson Discussion: https://postgr.es/m/YV1CCFwgM1RV1LeS@paquier.xyz Backpatch-through: 12