Branch
# variations on assignments
pat0 simple
pat1 -neg
* notundef
pat2 !notundef
pat3 assigned=test-value
pat4 rule-with-more-chars=value-with-more-chars
pat5 empty=
pat6 -negempty=
pat7 multiple -single values=1 also=a-really-long-value/* happy=yes!
# the next line has trailing spaces
pat8 again= another=12321
patbad0 # empty assignment does not count
# next line will be another simple empty assign that should not count
patbad1
# BTW I think there are 11 valid rules and two "invalid" empty ones
pat9 -at-eof