matchers.go
func NewPathPrefix(prefix string) PathPrefix {
	if !strings.HasPrefix(prefix, "/") {
		prefix = "/" + prefix
	}
	return PathPrefix(prefix)
}
func NewPathPrefix(prefix string) PathPrefix {
	if !strings.HasPrefix(prefix, "/") {
		prefix = "/" + prefix
	}
	return PathPrefix(prefix)
}
func NewPathPrefix ( prefix string ) PathPrefix { if ! strings . HasPrefix ( prefix , " " ) { prefix = " " + prefix } return PathPrefix ( prefix ) }
// PathPrefix -----------------------------------------------------------------
// NewPathPrefix returns a static URL path prefix matcher.
PathPrefix ----------------------------------------------------------------- NewPathPrefix returns a static URL path prefix matcher .