`~` and/or `$HOME` can't be used for `theme-directory` path

[danielwerg]

Both theme-directory = ~/.config/git/split-diffs-themes and theme-directory = $HOME/.config/git/split-diffs-themes return Error: ENOENT: no such file or directory error

This makes it impossible to use same config on multiple machines with different user names.

[kud]

What I did for now in the meantime is

.gitconfig:

[include]
	path = .gitconfig_local

.gitconfig_local

[split-diffs]
	theme-directory = /path/for/this/computer/