// quoted region, and are removed from the resulting substrings. If a quote in s
// isn't closed err will be set and r will have the unclosed argument as the
// last element. The backslash is used for escaping.
//
// For example, the following string:
//
//	`a b:"c d" 'e''f'  "g\""`
//
// Would be parsed as:
//
//	[]string{"a", "b:c d", "ef", `g"`}