Handle TABs in code

[Arthurm1]

The position info for code that uses TABs 🤮 seems to be off.

Example source file...

public class BarJava
{
 private Integer i;
→private Integer j;
}

To be clear...
i variable definition has a single space before private
j variable definition has a single tab before private

Resulting snapshot index...

public class BarJava
//           ^^^^^^^ definition javafoo/BarJava# public class BarJava
//           ^^^^^^^ definition javafoo/BarJava#`<init>`(). public BarJava()
{
 private Integer i;
//       ^^^^^^^ reference java/lang/Integer#
//               ^ definition javafoo/BarJava#i. private Integer i
→private Integer j;
//              ^^^^^^^ reference java/lang/Integer#
//                      ^ definition javafoo/BarJava#j. private Integer j
}

i position looks fine
j position looks out