Imports of package renderer

PathSynopsis
bufioPackage bufio implements buffered I/O. It wraps an io.Reader or io.Writer object, creating another object (Reader or Writer) that also implements the interface but provides buffering and some help for textual I/O.
github.com/yuin/goldmark/astPackage ast defines AST nodes that represent markdown elements.
github.com/yuin/goldmark/utilPackage util provides utility functions for the goldmark.
ioPackage io provides basic interfaces to I/O primitives.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.