             @updateLoops++
             @item[@prop] = r
             if @updateLoops is MAX_LOOPS
-                log.error "Potential anchors loop detected. Recalculating on this anchor (#{@}) has been disabled."
+                log.error """
+                    Potential anchors loop detected; \
+                    recalculating on this anchor (#{@}) has been disabled
+                """
                 @updateLoops++
             else if @updateLoops < MAX_LOOPS
                 @updateLoops--

                    item.onParentChange onParentChange, @
                    onParentChange.call @, null
                when 'children'
                    @targetItem = item._children
                    item.onChildrenChange onChildrenChange, @
                    child = @targetItem.firstChild
                    while child

                when 'parent'
                    targetItem = @item._parent
                when 'children'
                    targetItem = @item.children
                when 'nextSibling'
                    targetItem = @item._nextSibling
                when 'previousSibling'
