Imports golang.org/x/tour/wc golang.org/x/tour/tree golang.org/x/tour/pic golang.org/x/tools/present golang.org/x/tools/playground/socket golang.org/x/tools/godoc/static Standard library imports go/parser go/printer go/build go/ast go/token bytes encoding/json flag fmt html/template io io/ioutil log net net/http net/url os os/exec path/filepath runtime strings time