Diff fails if your home directory has a space (tested on windows)

[angelidis]

hi Bai,

thank you for developing this amazing plugin.
i think i found the following bug.

1. assume home directory:
   "C:\Users\FirstName LastName"

2. launch undotree

3. the Diff window will say:
   �[31;1mCompare-Object: �[31;1mA positional parameter cannot be found that accepts argument 'C:\Users\FirstName'.�[0m

environment:
neovim-9.5
windows 11