YamlReference-0.9.3: tests/c-single-quoted.n=4.c=flow-out.invalid.output
# B: 0, C: 0, L: 1, c: 0 S # B: 0, C: 0, L: 1, c: 0 s # B: 0, C: 0, L: 1, c: 0 !Unexpected 'a'
# B: 0, C: 0, L: 1, c: 0 S # B: 0, C: 0, L: 1, c: 0 s # B: 0, C: 0, L: 1, c: 0 !Unexpected 'a'