update-shells | 4 2 + 2 - 0 !
update-shells.8 | 2 2 + 0 - 0 !
2 files changed, 4 insertions(+), 2 deletions(-)

 set the default for root to $dpkg_root

update-shells | 6 4 + 2 - 0 !
1 file changed, 4 insertions(+), 2 deletions(-)

 do not create duplicate entries in /etc/shells

update-shells | 7 4 + 3 - 0 !
1 file changed, 4 insertions(+), 3 deletions(-)

 manage (/usr)/bin/sh in the state file

update-shells | 2 1 + 1 - 0 !
1 file changed, 1 insertion(+), 1 deletion(-)

 fix detection of shells in aliased locations
 only canonicalize the directory where the shell resides,
 not the shell itself (which may be a symlink, e.g. managed by
 update-alternatives)
Bug-Debian: https://bugs.debian.org/1035820