foo = 1 ^^^^^^^
$foo ||= bar
becomes
defined?($foo) ? $foo : $foo = bar
$foo += bar
becomes
$foo = $foo + bar
@foo &&= bar
becomes
@foo && @foo = bar
@foo ||= bar
becomes
@foo || @foo = bar
@foo += bar
becomes
@foo = @foo + bar
@@foo, = bar ^^^^^
Foo += bar ^^^^^^^^^^^
Foo &&= bar ^^^^^^^^^^^^
Foo ||= bar ^^^^^^^^^^^^
Foo::Bar = 1 ^^^^^^^^^^^^
Foo::Foo, Bar::Bar = 1 ^^^^^^^^ ^^^^^^^^
$foo = 1 ^^^^^^^^
@foo = 1 ^^^^^^^^