FA-4037 / Binary formats / Member archive
Hex formatting places a separator between nybbles · case 02
Hex formatting places a separator between nybbles.
Case contract
Format bytes as lowercase two-digit hex groups separated by one colon; empty input empty.
Why this case matters
A local executable model for consumers of structured text; oracle values are authored literals, not outputs copied from the repaired implementation.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| boundary 1 | "0:0:0:a:f:f" | "00:0a:ff" | Failed |
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