prolog-electric-dot-flag

prolog-electric-dot-flag is a variable defined in `prolog.el'.
Its value is

nil

Documentation:
Non-nil means make dot key electric.
Electric dot appends newline or inserts head of a new clause.
If dot is pressed at the end of a line where at least one white space
precedes the point, it inserts a recursive call to the current predicate.
If dot is pressed at the beginning of an empty line, it inserts the head
of a new clause for the current predicate. It does not apply in strings
and comments.
It does not apply in strings and comments.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.