Restore test coverage for lexing of tabulators
Restore test coverage for lexing of tabulators

In f85f708bfbe4dcc25cf40910f44a4157781ecdc9, hard tabs were removed from some
.tas source files, but this resulted in a reduction in test coverage. Co-opt an
existing lexer test to prove that we can lex files that contain hard
tabulators.

kulp/tenyr,kulp/tenyr,kulp/tenyr