--- **
a1: 5
a2: 5
a3: 5
a4: 5
a5: 5

--- *
a1: 4
a2: 4
a3: 4
a4: 4

--- 2013-10-18-metadata-test.md
a1: 3
a2: 3
a3: 3

--- nonexistent
a3: 0