-e=s/foo/bar/
-e s/foo/bar/
-e=s/foo/bar/
-e s/foo/bar/

-Ifoo/bar
-Ifoo/bar/baz
-I foo/bar/
-I foo/bar
-I foo/bar/baz

-Ifoo/bar
-Ifoo/bar/baz
-I foo/bar/
-I foo/bar
-I foo/bar/baz

foo/bar

//foo
/foo
/foo/bar