Simplify match nesting in theme with if let
Simplify match nesting in theme with if let

kbknapp/mdBook,superstring/mdBook,petehayes102/mdBook,superstring/mdBook,kbknapp/mdBook,petehayes102/mdBook,petehayes102/mdBook,azerupi/mdBook,kbknapp/mdBook,superstring/mdBook,kbknapp/mdBook,azerupi/mdBook,superstring/mdBook,azerupi/mdBook,petehayes102/mdBook,azerupi/mdBook