[FIX] docstring;
[FIX] docstring;
sebalix/openupgradelib,blaggacao/openupgradelib,StefanRijnhart/openupgradelib,kurkop/openupgradelib,OCA/openupgradelib,pedrobaeza/openupgradelib,bwrsandman/openupgradelib,hbrunn/openupgradelib