This library applies to retail versions of World of Warcraft. Leaving the library unused but loaded won't error in classic editons of WoW.
This library exists to add lines with a left and right component of unlimited length to a battle pet tooltip without having to wrap the text or have multiple lines not match up.
local LibBattlePetTooltipLine = LibStub("LibBattlePetTooltipLine-1-0")
hooksecurefunc("BattlePetToolTip_Show", function(...)
LibBattlePetTooltipLine:AddDoubleLine(BattlePetTooltip, "Special Detail",
RED_FONT_COLOR:WrapTextInColorCode("Me"))
end)