line: Avoid division when maximum_operations_per_instruction == 1
line: Avoid division when maximum_operations_per_instruction == 1

Before:
test bench_executing_line_number_programs ... bench: 246,375 ns/iter (+/- 11,192)

After:
test bench_executing_line_number_programs ... bench: 173,505 ns/iter (+/- 4,188)

gimli-rs/gimli,gimli-rs/gimli