Compound words tokenization failure

[cathxiao]

Expected Behavior

Compound words (e.g. pick-me-up, hand-me-down, know-it-all, etc.) should be tokenized as single tokens.

Actual Behavior

hyphens are treated as separators, and the components are tokenized separately.

[jdchoi77]

These should be tokenized because they can occur without the hyphens (e.g., pick me up) and it should be tokenized consistently.