Use information about prior splits to make sure merges work right.
treec7fd6417e8c6e015676cd221f849f23fa16f29de
-rw-r--r-- 3 .gitignore
lrwxrwxrwx 14 git-subtree -> git-subtree.sh
-rwxr-xr-x 4459 git-subtree.sh
-rw-r--r-- 23 shellopts.sh