DBG4 # Colon in flow scalar
FRK4 # XXX Why is explicit key in flow?
KZN9 # Null key
-M7A3 # libyaml wants explicit --- for docs after ...
+M7A3 # No --- after ...
N782 # --- and ... as flow values
NHX8 # Null key
R4YG # Tab char in possible indentation in folded scalar