flame@yamato bzr % bzr branch http://bzr.savannah.nongnu.org/r/man-db
http://bzr.savannah.nongnu.org/r/man-db/ is permanently redirected to http+urllib://bzr.savannah.gnu.org/r/man-db/
bzr: ERROR: Not a branch: “http+urllib://bzr.savannah.gnu.org/r/man-db/.bzr/branch/“.
The command is copy-pasted from Savannah …
And yes, this was trying to fix man-db with heirloom-doctools .