replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a
      file or class name and description of purpose be included on the
      same "printed page" as the copyright notice for easier
      identification within third-party archives.

pkg fmt, func Sscanf(string, string, ...interface{}) (int, error)
pkg fmt, func Sscanln(string, ...interface{}) (int, error)
pkg fmt, type Formatter interface { Format }
pkg fmt, type Formatter interface, Format(State, int32)
pkg fmt, type GoStringer interface { GoString }
pkg fmt, type GoStringer interface, GoString() string