remove typo and redundant code

processor.go

@@ -310,7 +310,7 @@ func (p *processor) queues() []string {
 	}
 	var names []string
 	for qname, priority := range p.queueConfig {
-		for i := 0; i < int(priority); i++ {
+		for i := 0; i < priority; i++ {
 			names = append(names, qname)
 		}
 	}

servemux.go

@@ -15,7 +15,7 @@ import (
 // ServeMux is a multiplexer for asynchronous tasks.
 // It matches the type of each task against a list of registered patterns
 // and calls the handler for the pattern that most closely matches the
-// taks's type name.
+// task's type name.
 //
 // Longer patterns take precedence over shorter ones, so that if there are
 // handlers registered for both "images" and "images:thumbnails",