Don't use `& $this`

[rmccue]

From PHP 5 onwards, all objects are passed by reference, so & $this is redundant. This is a common pattern with add_action/add_filter calls (since the callback is an array), but should just the bare $this instead.

[tomjn]

Agreed, are you referring more to this:

https://github.com/cftp/babble/blob/master/class-plugin.php#L208

[simonwheatley]

I will happily merge a pull request which removes these ;)

[markoheijnen]

Note that #172 makes a change that will create a merge conflict.