Commit 14ff3516e5f4203838a0edb044c6622b8e3a3755

Edward Thomson 2019-12-03T23:15:47

path: support non-ascii drive letters on dos Windows/DOS only supports drive letters that are alpha characters A-Z. However, you can `subst` any one-character as a drive letter, including numbers or even emoji. Test that we can identify emoji as drive letters.