pkg encoding/base64, method (Encoding) WithPadding(int32) *Encoding
pkg encoding/base64, var RawStdEncoding *Encoding
pkg encoding/base64, var RawURLEncoding *Encoding
pkg encoding/json, method (*Decoder) More() bool
pkg encoding/json, method (*Decoder) Token() (Token, error)
pkg encoding/json, method (Delim) String() string
pkg encoding/json, type Delim int32
pkg encoding/json, type Token interface {}

often the name of a go subcommand (list, build, test, ...) or concept (vendor, pattern).

Each script is a text archive (go doc internal/txtar).
The script begins with an actual command script to run
followed by the content of zero or more supporting files to
create in the script's temporary file system before it starts executing.

As an example, run_hello.txt says:

	# hello world
	go run hello.go
	stderr 'hello world'
	! stdout .

// Small moves
(Move [0] _ _ mem) => mem
(Move [1] dst src mem) => (MOVBstore dst (MOVBload src mem) mem)
(Move [2] {t} dst src mem) && t.Alignment()%2 == 0 =>
	(MOVHstore dst (MOVHload src mem) mem)
(Move [2] dst src mem) =>
	(MOVBstore [1] dst (MOVBload [1] src mem)
		(MOVBstore dst (MOVBload src mem) mem))
(Move [4] {t} dst src mem) && t.Alignment()%4 == 0 =>

		mem)

// moves
(Move [0] _ _ mem) => mem
(Move [1] dst src mem) => (MOVBstore dst (MOVBload src mem) mem)
(Move [2] {t} dst src mem) && t.Alignment()%2 == 0 =>
	(MOVHstore dst (MOVHload src mem) mem)
(Move [2] dst src mem) =>
	(MOVBstore [1] dst (MOVBload [1] src mem)
		(MOVBstore dst (MOVBload src mem) mem))
(Move [4] {t} dst src mem) && t.Alignment()%4 == 0 =>

		mem)

// moves
(Move [0] _ _ mem) => mem
(Move [1] dst src mem) => (MOVBstore dst (MOVBload src mem) mem)
(Move [2] {t} dst src mem) && t.Alignment()%2 == 0 =>
	(MOVHstore dst (MOVHload src mem) mem)
(Move [2] dst src mem) =>
	(MOVBstore [1] dst (MOVBload [1] src mem)
		(MOVBstore dst (MOVBload src mem) mem))
(Move [4] {t} dst src mem) && t.Alignment()%4 == 0 =>

		mem)

// moves
(Move [0] _ _ mem) => mem
(Move [1] dst src mem) => (MOVBstore dst (MOVBUload src mem) mem)
(Move [2] {t} dst src mem) && t.Alignment()%2 == 0 =>
	(MOVHstore dst (MOVHUload src mem) mem)
(Move [2] dst src mem) =>
	(MOVBstore [1] dst (MOVBUload [1] src mem)
		(MOVBstore dst (MOVBUload src mem) mem))
(Move [4] {t} dst src mem) && t.Alignment()%4 == 0 =>

understand `godebug` at all.)

The defaults from the `go` and `godebug` lines apply to all main
packages that are built. For more fine-grained control,
starting in Go 1.21, a main package's source files
can include one or more `//go:debug` directives at the top of the file
(preceding the `package` statement).
The `godebug` lines in the previous example would be written:

	//go:debug default=go1.21

pkg encoding/csv, method (*Reader) FieldPos(int) (int, int)
pkg go/build, type Context struct, ToolTags []string
pkg go/parser, const SkipObjectResolution = 64
pkg go/parser, const SkipObjectResolution Mode
pkg image, method (*Alpha) RGBA64At(int, int) color.RGBA64
pkg image, method (*Alpha) SetRGBA64(int, int, color.RGBA64)
pkg image, method (*Alpha16) RGBA64At(int, int) color.RGBA64

pkg os, method (FileMode) Perm() FileMode
pkg os, method (FileMode) String() string
pkg os, type FileInfo interface { IsDir, ModTime, Mode, Name, Size, Sys }
pkg os, type FileInfo interface, IsDir() bool
pkg os, type FileInfo interface, ModTime() time.Time
pkg os, type FileInfo interface, Mode() FileMode
pkg os, type FileInfo interface, Name() string
pkg os, type FileInfo interface, Size() int64

// Lowering moves
(Move [0] _ _ mem) => mem
(Move [1] dst src mem) => (I64Store8 dst (I64Load8U src mem) mem)
(Move [2] dst src mem) => (I64Store16 dst (I64Load16U src mem) mem)
(Move [4] dst src mem) => (I64Store32 dst (I64Load32U src mem) mem)
(Move [8] dst src mem) => (I64Store dst (I64Load src mem) mem)
(Move [16] dst src mem) =>
	(I64Store [8] dst (I64Load [8] src mem)