Remove requirement of no spaces before object operator ->

[qheaden]

This commit removes the line from the ruleset requiring a space to
come before the arrow object operator ->. PSR2 does not enforce this
rule, and removing this rule will allow cleaner code when dealing
with fluent interfaces and method chaining. For example:

$obj->method1()
->method2()
->method3();

or

$obj
->method1()
->method2()
->method3();

This is especially useful when setting up PHPUnit mocks and their
constraints.

What does this PR do?

Checklist

• Pull request contains a clear definition of changes
• Tests (either unit, integration, or acceptance) written and passing
• Relevant documentation produced and/or updated

[coveralls]

Coverage remained the same at 100.0% when pulling 4769bc9 on qheaden:feature/remove-operator-space-requirement into c1e8da9 on traderinteractive:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 4769bc9 on qheaden:feature/remove-operator-space-requirement into c1e8da9 on traderinteractive:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 4769bc9 on qheaden:feature/remove-operator-space-requirement into c1e8da9 on traderinteractive:master.