tree: change branch indent
tree: change branch indent

make go lint happy

kingland/httprouter,cmars/tools,hawx/route,laurennicoleroth/httprouter,Pacoup/httprouter,sdac/httprouter,cmars/tools,jjeffery/httprouter,TheHippo/httprouterc,glycerine/httprouter,cmars/tools,julienschmidt/httprouter,herzog31/httprouter,agaurav/httprouter,hiteshjoshi/httprouter,b54898533/httprouter,cmars/tools,EricLagergren/httprouter,nigeldunn/httprouter