cperl-auto-newline

cperl-auto-newline is a variable defined in `cperl-mode.el'.
Its value is

nil

Documentation:
*Non-nil means automatically newline before and after braces,
and after colons and semicolons, inserted in CPerl code. The following
M-x cperl-electric-backspace will remove the inserted whitespace.
Insertion after colons requires both this variable and
`cperl-auto-newline-after-colon' set.

You can customize this variable.