Validate whitespace around <<

[daviddavis]

Rubocop seems not to mind this code:

a = []
a                   <<                  '1'

I'd expect SpaceAroundOperators to pick this up.

[bquorning]

This was a surprise to me, too. It seems that Style::SpaceAroundOperators only complains if there are no spaces around the operators, not if there are too many.

[bbatsov]

Pretty sure the reason for this was = and the fact that some people write code like:

ala_bala = 5
x        = 10

I think we should start checking for extra whitespace and just introduce a config option to ignore certain ops.

[bquorning]

That makes sense.

It looks like it's pretty easy to change SpaceAroundOperators to check for too many spaces. Should I try fixing this one?

[bbatsov]

You definitely should! :-)

[daviddavis]

👍 @bbatsov and @bquorning

[bquorning]

Proposed fix in #1654.