That's a typo. It's swaged, which a means of mechanically attaching two parts. Typically, one part has flange which the other part fits over. In the case of the right crankarm, the spider, usually with integral large chainring, fits over a flange on the crankarm. The flange is than then bent over to attach the two parts, either with a press or hammer.

The alternative is have to the spider cast as one piece with the arm or fit onto splines on the arm.