Status.IsClean() seems reversed

[mickael-carl]

Looking at the Status.IsClean() function, the documentation states the following:

IsClean returns true if all the files aren't in Unmodified status.

But shouldn't it be the opposite ? Namely, the worktree status is clean, if all files are unmodified, and not clean if any file has a modification, or an untracked file is present, or a file has been deleted. See for instance the output of git status:

• with a worktree containing no modifications:

On branch master
nothing to commit, working tree clean

• with a worktree containing modifications:

On branch master
Changes to be committed:
(use "git reset HEAD ..." to unstage)
new file: foo