go/printer: fix test for new import path restrictions

Import paths with spaces are now invalid.

The builders would've caught this if they were running
the long tests.  I've removed the check for short tests
in this package since the current tests are fast enough
already.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5694082

src/pkg/go/printer/printer_test.go

@@ -154,15 +154,12 @@ var data = []entry{
 }
 
 func TestFiles(t *testing.T) {
-	for i, e := range data {
+	for _, e := range data {
 		source := filepath.Join(dataDir, e.source)
 		golden := filepath.Join(dataDir, e.golden)
 		check(t, source, golden, e.mode)
 		// TODO(gri) check that golden is idempotent
 		//check(t, golden, golden, e.mode)
-		if testing.Short() && i >= 3 {
-			break
-		}
 	}
 }
 

src/pkg/go/printer/testdata/declarations.golden

@@ -83,13 +83,13 @@ import (
 // more import examples
 import (
 	"xxx"
-	"much longer name"	// comment
-	"short name"		// comment
+	"much_longer_name"	// comment
+	"short_name"		// comment
 )
 
 import (
 	_ "xxx"
-	"much longer name"	// comment
+	"much_longer_name"	// comment
 )
 
 import (

src/pkg/go/printer/testdata/declarations.input

@@ -84,13 +84,13 @@ import (
 // more import examples
 import (
 	"xxx"
-	"much longer name" // comment
-	"short name" // comment
+	"much_longer_name" // comment
+	"short_name" // comment
 )
 
 import (
 	_ "xxx"
-	"much longer name" // comment
+	"much_longer_name" // comment
 )
 
 import (