haskell/filepath — pull request #17 by thomie (2014-10-26 20:30:54+00:00)
Title: Bug fix: isDrive "" == False

isDrive is only called from `dropTrailingPathSeparator` and `combineAlways`.
Both times occur after a check if the argument is not empty (i.e. null for
combineAlways, and hasTrailingPathSeparator for dropTrailingPathSeparator). So
this change is safe.