YAML

> folded - it removes newlines within the string and adds one at the end:

key: >
  this is a long string and this will be
  displayed

The result:

this is a long string and this will be displayed

| literal - it turns newlines within the string into explicit newlines in the result and adds one at the end:

key: >
  this is a long string and this will be
  displayed

The result:

this is a long string and this will be\n displayed\n