Iterate over "export" statement of ES6

Fixes gh-753
Autofixing: assertions
TokenAssert class introduction
new line comparison: disallow/require comma before line break
Binary rules simplified
Required/redundant token assertions
Assertions for validateParameterSeparator
Object-options in assertions. Specific amount of spaces assertions.
Minor fixes
whitespaceBetween, noWhatespaceBetween tests and fixes
Final tests for TokenAssert