Adding fixing code to NamespaceDeclaration sniff
Adding fixing code to SpacingOperator sniff

- only look for spacing before comparison operators (because that's what "Squiz.WhiteSpace.OperatorSpacing" doesn't do)
- skip cases when there are no whitespace, because "Squiz.WhiteSpace.OperatorSpacing" will handle that
Adding fixing code to SpaceUnaryOperator sniff
Adding fixing code to FunctionDeclaration sniff