review: fix: position of (String arg[])

[pvojtechovsky]

Position of parameter arg is incorrect in this code

void method(String arg[])

[pvojtechovsky]

@tdurieux this is an interesting case ... String arg[] the CtParameter.getType.getPosition must return String arg[] ... including parameter name... What SourcePosition type we will use for that special case???
See test of this PR for details.

[tdurieux]

:/ Java...

I'm not sure, I would say DeclarationSourcePosition

and the failing test-case is strange:
PositionTest.testArrayArgParameter:767 expected:<String arg[[]]> but was:<String arg[]> I don't understand the diff