A `:' is only inserted if this value is non-nil, if a rule or subrule
option is inserted with \\[antlr-insert-option], if there was no rule or
subrule options section before, and if a `:' is not already present
A `:' is only inserted if this value is non-nil, if a rule or subrule
option is inserted with \\[antlr-insert-option], if there was no rule or
subrule options section before, and if a `:' is not already present