--- 
test: Missing value for hash item 
brief: | 
    Third item in this hash doesn't have a value 
yaml: | 
    okay: value 
    also okay: ~ 
    causes error because no value specified 
    last key: value okay here too 
python-error: causes error because no value specified 
 
--- 
test: Not indenting enough 
brief: | 
    There was a bug in PyYaml where it was off by one 
    in the indentation check.  It was allowing the YAML  
    below. 
# This is actually valid YAML now. Someone should tell showell. 
yaml: | 
    foo: 
    firstline: 1 
    secondline: 2 
python-error: Inadequate indentation