fix(examples): use underscore instead of hyphen

[harry-hov]

gno/tm2/pkg/std/memfile.go

Lines 33 to 67 in 98cc986

	const (
	reDomainPart = `gno\.land`
	rePathPart = `[a-z][a-z0-9_]*`
	rePkgName = `^[a-z][a-z0-9_]*$`
	rePkgPath = reDomainPart + `/p/` + rePathPart + `(/` + rePathPart + `)*`
	reRlmPath = reDomainPart + `/r/` + rePathPart + `(/` + rePathPart + `)*`
	rePkgOrRlmPath = `^(` + rePkgPath + `|` + reRlmPath + `)$`
	reFileName = `^[a-zA-Z0-9_]*\.[a-z0-9_\.]*$`
	)
	// path must not contain any dots after the first domain component.
	// file names must contain dots.
	// NOTE: this is to prevent conflicts with nested paths.
	func (mempkg *MemPackage) Validate() error {
	ok, _ := regexp.MatchString(rePkgName, mempkg.Name)
	if !ok {
	return errors.New(fmt.Sprintf("invalid package name %q", mempkg.Name))
	}
	ok, _ = regexp.MatchString(rePkgOrRlmPath, mempkg.Path)
	if !ok {
	return errors.New(fmt.Sprintf("invalid package/realm path %q", mempkg.Path))
	}
	fnames := map[string]struct{}{}
	for _, memfile := range mempkg.Files {
	ok, _ := regexp.MatchString(reFileName, memfile.Name)
	if !ok {
	return errors.New(fmt.Sprintf("invalid file name %q", memfile.Name))
	}
	if _, exists := fnames[memfile.Name]; exists {
	return errors.New(fmt.Sprintf("duplicate file name %q", memfile.Name))
	}
	fnames[memfile.Name] = struct{}{}
	}
	return nil
	}

The regular expression here does not allow -(hyphen) in package or realm path.

Renamed r/demo/releases-example -> r/demo/releases_example

[tbruyelle]

Just like go package identifier 👍