union method works differently on 1.7.0

[adriano-di-giovanni]

The following instruction

_.union([ 'a', 'b' ], 'c');

outputs

[ 'a', 'b' ]

instead of

[ 'a', 'b', 'c' ]

if v1.7.0 is used.

[akre54]

Yup. That was changed in #1428 and #1474 to bring it up to par with _.intersection (#1317). See those issues for the reasoning.

[akre54]

I'll add a note in the changelog about this too.