ruby-here-doc-beg-re

ruby-here-doc-beg-re is a variable defined in `ruby-mode.el'.
Its value is

"\\(<\\)<\\(-\\)?\\(\\([a-zA-Z0-9_]+\\)\\|[\"]\\([^\"]+\\)[\"]\\|[']\\([^']+\\)[']\\)"

• This variable may be risky if used as a file-local variable.

Documentation:
Regexp to match the beginning of a heredoc.