strconv: Document that Unquote("''") doesn't return error #64280
Description
What version of Go are you using (go version)?
$ go version go version go1.21.4 darwin/arm64
The documentation for strconv.Unquote currently reads
package strconv // import "strconv"
func Unquote(s string) (string, error)
Unquote interprets s as a single-quoted, double-quoted, or backquoted
Go string literal, returning the string value that s quotes. (If s is
single-quoted, it would be a Go character literal; Unquote returns the
corresponding one-character string.)
However, strconv.Unquote("''") equals the empty string, whereas from the documentation one would assume this to return an invalid-syntax error. Perhaps a reasonable addition to the documentation would be
If s is an empty pair of single quotes, Unquote returns the empty string.