Go1.12 strings.Map breaks package usage of strings.ToLower

[cybrcodr]

Heads up. Go1.12 CL https://golang.org/cl/131495 will break this package's use of strings.ToLower calls. This is exhibited in the following test failure ...

$ go version
go version go1.12beta1 linux/386
$ go test
--- FAIL: TestTreeFindCaseInsensitivePath (0.00s)
    tree_test.go:532: Route '/u/äpfêl/' not found!
    tree_test.go:532: Route '/u/öpfêl' not found!
    tree_test.go:532: Route '/v/Äpfêl/' not found!
    tree_test.go:532: Route '/v/Öpfêl' not found!
    tree_test.go:532: Route '/w/♬' not found!
    tree_test.go:532: Route '/w/♭/' not found!
    tree_test.go:532: Route '/w/𠜎' not found!
    tree_test.go:532: Route '/w/𠜏/' not found!
    tree_test.go:541: Route '/u/äpfêl/' not found!
    tree_test.go:541: Route '/u/öpfêl' not found!
    tree_test.go:541: Route '/v/Äpfêl/' not found!
    tree_test.go:541: Route '/v/Öpfêl' not found!
    tree_test.go:541: Route '/w/♬' not found!
    tree_test.go:541: Route '/w/♭/' not found!
    tree_test.go:541: Route '/w/𠜎' not found!
    tree_test.go:541: Route '/w/𠜏/' not found!
    tree_test.go:613: Wrong result for '/u/ÄPFÊL/': got /, false; want /u/äpfêl/, true
FAIL
exit status 1

[julienschmidt]

Fixed by 667c1db