case: 
node: []
warn: []

case: \t
node: []
warn: []

case: \t\n
node: []
warn: []

case: \t alpha
node: [Text(alpha)]
warn: []

case: \talpha
node: [Text(alpha)]
warn: []

case: \n
node: []
warn: []

case: \n\t
node: []
warn: []

case: \n\n\nalpha
node: [Text(alpha)]
warn: [Warning(RepeatedEmptyLine), Warning(RepeatedEmptyLine)]

case: \n\nalpha
node: [Text(alpha)]
warn: [Warning(RepeatedEmptyLine)]

case: \n\nalpha\n\n
node: [Text(alpha)]
warn: [Warning(RepeatedEmptyLine)]

case: \n \nalpha
node: [Text(alpha)]
warn: [Warning(RepeatedEmptyLine)]

case: \nalpha
node: [Text(alpha)]
warn: []

case: \nalpha\n
node: [Text(alpha)]
warn: []

case:  
node: []
warn: []

case:  \n\nalpha
node: [Text(alpha)]
warn: [Warning(RepeatedEmptyLine)]

case:  \nalpha
node: [Text(alpha)]
warn: []

case:   
node: []
warn: []

case: !!
node: [Text(!!)]
warn: []

case: alpha
node: [Text(alpha)]
warn: []

case: alpha\t
node: [Text(alpha)]
warn: []

case: alpha\n
node: [Text(alpha)]
warn: []

case: alpha\n\t
node: [Text(alpha)]
warn: []

case: alpha\n\n
node: [Text(alpha)]
warn: []

case: alpha\n\n\n
node: [Text(alpha)]
warn: [Warning(RepeatedEmptyLine)]

case: alpha\n\n 
node: [Text(alpha)]
warn: []

case: alpha\n 
node: [Text(alpha)]
warn: []

case: alpha\n \n
node: [Text(alpha)]
warn: []

case: alpha\nbeta
node: [Text(alpha\nbeta)]
warn: []

case: alpha 
node: [Text(alpha)]
warn: []

case: alpha \n
node: [Text(alpha)]
warn: []