use system line separator

[nhomble]

Description

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[whiskeysierra]

What about this instead?

private final String pretty = Stream.of(
    "{",
    "  \"root\": {",
    "    \"child\": \"text\"",
    "  }",
    "}"
).collect(joining(System.lineSeparator()));

[whiskeysierra]

👍

[whiskeysierra]

Thank you for your contribution! 📣