Describe the bug

The SchemaPrinter utility generates slightly different results for schemas that contain multi-line descriptions when run on Windows vs Linux/macOS.

For some reason, \r\n line endings are used for multi-line descriptions only, and an extra blank line is inserted after the opening """.

To Reproduce

Using a schema like so:

type Query {
  """
  This does
  something.
  """
  myQuery: String
}

The SchemaPrinter will generate something like this on Windows (I'm using Java literals here for illustration - the actual results contain binary carriage returns and line feeds):

type Query {\n
  """\n
  \r\n
  This does\r\n
  something.\r\n
  """\n
  myQuery: String\n
}\n

On Unix-based systems, the results are as expected.