HTML - Flex spacing

Individually spaced items - `.pf-m-spacer-{xs,sm,md,lg,xl,2xl,3xl}`.

Item - none

Item - xs

Item - sm

Item - md

Item - lg

Item - xl

Item - 2xl

Item - 3xl

Flex with modified spacing - `.pf-m-space-items-xl`.

Flex item

Flex item

Flex item

Flex item

Flex item

Flex with modified spacing - `.pf-m-space-items-none`.

Flex item

Flex item

Flex item

Flex item

Flex item