fix pruneCmd to use optionals so multi-element list is preserved
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@ -166,7 +166,7 @@ in
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backupPaths = if (backup.dynamicFilesFrom == null)
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then concatStringsSep " " backup.paths
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else "--files-from ${filesFromTmpFile}";
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pruneCmd = optional (builtins.length backup.pruneOpts > 0) [
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pruneCmd = optionals (builtins.length backup.pruneOpts > 0) [
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( resticCmd + " forget --prune " + (concatStringsSep " " backup.pruneOpts) )
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( resticCmd + " check" )
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];
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