Replacing 'nil' with an explicit 'finger-tree-empty' type.
Replacing 'nil' with an explicit 'finger-tree-empty' type.
pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/racepoint,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch,pauldoo/scratch