RegressionTestHelper / TestNonRegression line endings issue developing on Windows

[macg33zr]

When developing on windows, when the call stack regression test file is generated it has Windows line endings (\r\n). After commit the regression test fails as the comparison does not normalise the line endings. The helper needs to normalise line endings.

In class RegressionTestHelper the method TestNonRegression it needs to do this:

assertThat(callStack.normalize()).isEqualTo(referenceFile.text.normalize())