qulicecheckstyle: Prohibit the strings which contains \n or \r\n

[dgroup]

The rule should restrict the strings which contain \n or \r\n.
These symbols are OS dependent line separators, therefore if we are using them in code - it might be OS dependent code base.

These strings should be rewritten considering System.lineSeparator or String.format("%n").

[0crat]

@krzyk/z please, pay attention to this issue

[0crat]

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[PeJetuz]

@yegor256
We have a "Windows line endings are not allowed" rule.
If I understand correctly, this is done on purpose so that the project has the same line separator.
Do you want to accept any line separator or should it depend on configuration properties?