ruby-syntax-before-regexp-re

ruby-syntax-before-regexp-re is a variable defined in `ruby-mode.el'.
Its value is

"\\(^\\|[[=(,~;<>]\\|[?:] \\|\\(?:^\\|\\s \\)\\(?:&&\\|and\\|elsif\\|if\\|not\\|or\\|un\\(?:less\\|til\\)\\|wh\\(?:en\\|ile\\)\\|||\\)\\|\\_<\\(?:Given\\|Then\\|When\\|assert_match\\|gsub!?\\|index\\|match\\|s\\(?:can\\|plit!?\\|ub!?\\)\\)\\)\\s *"

Documentation:
Regexp to match text that can be followed by a regular expression.