Can't submit a directory

[FabienTregan]

Environment

• Latest build from github (nextercism branch)
• Windows 10, cmd.exe shell

Observed behaviour

Answering either "[enter]" or "y[enter]" gives the same result :

D:\code\Exercism\workspace\rust\hello-world>..\..\..\v2.exe submit
You specified a directory, which contains these files:
 [1]  D:\code\Exercism\workspace\rust\hello-world\.gitignore
 [2]  D:\code\Exercism\workspace\rust\hello-world\Cargo.toml
 [3]  D:\code\Exercism\workspace\rust\hello-world\src\lib.rs

Press ENTER to submit, or control + c to cancel:
Submit cancelled.
Try submitting individually instead.
D:\code\Exercism\workspace\rust\hello-world>..\..\..\v2.exe submit
You specified a directory, which contains these files:
 [1]  D:\code\Exercism\workspace\rust\hello-world\.gitignore
 [2]  D:\code\Exercism\workspace\rust\hello-world\Cargo.toml
 [3]  D:\code\Exercism\workspace\rust\hello-world\src\lib.rs

Press ENTER to submit, or control + c to cancel: y
Submit cancelled.
Try submitting individually instead.
D:\code\Exercism\workspace\rust\hello-world>

Expected behaviour

D:\code\Exercism\workspace\rust\hello-world>..\..\..\v2.exe submit
You specified a directory, which contains these files:
 [1]  D:\code\Exercism\workspace\rust\hello-world\.gitignore
 [2]  D:\code\Exercism\workspace\rust\hello-world\Cargo.toml
 [3]  D:\code\Exercism\workspace\rust\hello-world\src\lib.rs

Press ENTER to submit, or control + c to cancel: y
Submitting files now...