a comma-separated explicit list of branches to export. This
mode of operation is currently not supported with collapse.
+ In '--quilt' mode the patches are named like the originating topgit
+ branch. So usually they end up in subdirectories of the output
+ directory. With option '--flatten' the names are mangled such that
+ they end up directly in the output dir (i.e. slashed are substituted by
+ underscores).
+
Usage: tg export ([--collapse] BRANCH | --quilt DIR)
TODO: Make stripping of non-essential headers configurable