HEX-ify rules debug non-rules outputs that contain colons

[roycewilliams]

Example:

TwinkleTwinkle!!:):::TwinkleTwinkle!!:)

Here, the "original word" - TwinkleTwinkle!!:) - passes through via the ':' rule, resulting in the "processed word". But other variations are possible that contain one or more colons, making it difficult to extract rules from the debug output.

Desired output:

$HEX[696e205477696e6b6c655477696e6b6c6521213a29]:::$HEX[696e205477696e6b6c655477696e6b6c6521213a29]

[jsteube]

Was fixed with PR #2854