func startsWithLowerCase(str string) bool {
	if len(str) == 0 {
		return false
	}
	c := str[0]
	return 'a' <= c && c <= 'z'
}

// nextStdChunk finds the first occurrence of a std string in
// layout and returns the text before, the std string, and the text after.
//
// nextStdChunk should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include: