or download this
use stricter 'names'; # no names in MixedCaps
use stricter 'features'; # no ties, lvalue subs or pseudohashes
...
use stricter 'syntax'; # no 'until' or 'unless' or c-style 'for' lo
+ops
use stricter 'whitespace' # no tabs, only spaces
use stricter 'layout'; # must match a perltidy format