Marco S Hyman [off-list ref] writes:
And there is NOTHING I can do to get that directory into git.
$ git add 2010
$ git commit -m 'will it work?'
# On branch master
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# 2010/
nothing added to commit but untracked files present (use "git add" to track)
The directory is not empty.
Perhaps "2010" or everything in it is ignored in .gitignore in
higher directories?