By default, perltidy breaks after these token types: % + - * / x != == >= <= =~ !~ < > | & = **= += *= &= <<= &&= -= /= |= >>= ||= //= .= %= ^= x=

And perltidy breaks before these token types by default: . << >> -> && || //

##</code><code>##

my $level =   # -ci=2      
  ( $max_index_to_go >= 0 ) ? $levels_to_go[0] : $last_output_level;