Directionless rules are expanded unnecessarily

[david-pfx]

Multiple rules are generated incorrectly for directionless rules.
From tubetransport:
[ wasMoved:dirs ] -> [ ]
generates the following:

  (1115) UP [ wasmoved:dirs ] -> [ ]
+ (1115) DOWN [ wasmoved:dirs ] -> [ ]
+ (1115) LEFT [ wasmoved:dirs ] -> [ ]
+ (1115) RIGHT [ wasmoved:dirs ] -> [ ]

Only one rule is required for a directionless rule. There is code in vanilla PS to detect and implement this.

[ClementSparrow]

I think it's a duplicate of #43, assuming that dirs is a shortcut for directions.

[david-pfx]

It's not a duplicate, but it is obviously related. The point is that there is a category of non-directional rules, and they never need to be expanded across the multiple rule directions. See the PS code for details.