The distance from 4.1 to 4.1.8.1 is one, not zero. When branching, the node revision causing the branch is a change, so count it.
The distance from 4.1 to 4.1.8.1 is one, not zero. When branching, the node
revision causing the branch is a change, so count it.

(distance_from_prefix): compute the correct distance for branches

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion