gistfile1.txt

# one or more words separated by commas
rule: /(<WORD>+)/ ** /~<COMMA>~/
text:
- "I, like, pie"
- "I"

# zero or more words separated by commas
rule: /(<WORD>+)/ ?** /~<COMMA>~/
text:
- "I, like, pie"
- "I"
- ""

# zero or more, trailing comma ok
rule: /(<WORD>+)/ ?**? /~<COMMA>~/
text:
- "I, like, pie"
- "I, like, pie,"
- "I"
- "I,"
- ""
- ","      # Not sure about this

# two or more terms separated by pipes
rule: /(<WORD>+)/ +** /~<PIPE>~/
text:
- "foo | bar"
- "foo | bar | baz"