vcsh configuration to handle collisions of files common to distinct vcsh
repositories using the sparse-checkout functionality of git.
+Based on John Whitley's setup at https://github.com/jwhitley/vcsh-root
+
The patterns for the colliding files are in .config/vcsh/sparse-checkout and
a pre-upgrade hook is used to make vcsh repositories use it.
Many git commands (e.g. git-merge, git-checkout) will automatically use the
information in $GIT_DIR/info/sparse-checkout when dealing with files in the
-git work directory, so generally a calling git-read-tree explicitly is not
+git working tree, so generally a calling git-read-tree explicitly is not
needed.
However when the content of $GIT_DIR/info/sparse-checkout changes it is
necessary to call "git read-tree -mu HEAD" to update the content of the
-working directory.
+working tree.