Argument labels in nested symbols

[PadLex]

This extract is from Mweiso.lud

and {
    if:(if ("SameTurn")
        (< 0 (count at:(from)))
        (< 1 (count at:(from)))
    )
    (is In (from) (sites {(mapEntry "LeftMostOuter" Mover) (mapEntry "SecondLeftInner" Mover)}))
    (is In ("NextHole" (from) "TrackCW" (count at:(from))) (sites Mover "Inner"))
    (is Occupied ("OppositePit" ("NextHole" (from) "TrackCW" (count at:(from)))))
    (is Occupied ("OppositeOuterPit" ("NextHole" (from) "TrackCW" (count at:(from)))))
}

Is the if: label intentional in if:(if ("SameTurn")? I'm struggling to grasp why a label might be in an array. The game compiles just fine without it and, as far as I can tell, plays identically.

If it was a mistake I can make a pull request to remove every occurance

[epiette]

Yes, this is probably an artefact from copy and paste.
Feel free to submit a pull request and I will accept it.