worktrees on different filesystems may not work; that's a
matter for the future. Closes:#868515.
+ Other improvements to dgit:
+ * New print-dpkg-source-ignores option to print the big rune
+ you need to pass to dpkg-source to make it work exactly the right.
+ * Properly shell-quote the --git-builder argument to gbp.
+
Documentation:
* dgit-user(7): Provide information about how to use sbuild.
Quite ugly due to #868527. Closes:#868526.