pub fn parse_version_answer(text: &str) -> Option<DogVersion>Expand description
Parses the format docs/dogs.md publishes: <name> <version> on line
1, then <key>: <value> lines.
None when there is no line 1. Unknown keys, blank lines, key order and
a non-numeric shep-protocol are all tolerated rather than refused;
only an exact SHEP_PROTOCOL_KEY carrying a decimal is believed.