code review 5316043: gc: clean up printing.

test/ddd1.go

 // errchk $G -e $D/$F.go
 
 // Copyright 2010 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 package main
 
 import "unsafe"
 
 func sum(args ...int) int { return 0 }
 
 var (
         _ = sum(1, 2, 3)
         _ = sum()
         _ = sum(1.0, 2.0)
         _ = sum(1.5)      // ERROR "integer"
-        _ = sum("hello")  // ERROR ".hello. .type string. as type int|incompatible"
+        _ = sum("hello")  // ERROR ".hello. .type ideal string. as type int|incompatible"
         _ = sum([]int{1}) // ERROR "\[\]int literal.*as type int|incompatible"
 )
 
 type T []T
 
 func funny(args ...T) int { return 0 }
 
 var (
         _ = funny(nil)
         _ = funny(nil, nil)
@@ skipping 11 matching lines @@
         _ = make([]byte, n...)  // ERROR "[.][.][.]"
         // TODO(rsc): enable after gofmt bug is fixed
         //      _ = make([]byte, 10 ...)        // error "[.][.][.]"
         var x int
         _ = unsafe.Pointer(&x...)       // ERROR "[.][.][.]"
         _ = unsafe.Sizeof(x...) // ERROR "[.][.][.]"
         _ = [...]byte("foo") // ERROR "[.][.][.]"
         _ = [...][...]int{{1,2,3},{4,5,6}}      // ERROR "[.][.][.]"
 }