Fix travis errors.

cmd/renfnv/renfnv.go

@@ -46,7 +46,6 @@ func newName(path string) (string, error) {
 func move(dst, src string, force bool) (err error) {
 	if fileutil.FileDoesExist(dst) && !force {
 		return fmt.Errorf("%s exists (pass the -f flag to overwrite)", dst)
-		return nil
 	}
 	dstFile, err := os.Create(dst)
 	if err != nil {

cmd/utc/main.go

@@ -72,7 +72,7 @@ Flags:
 
 func usageExamples() {
 	usage(os.Stdout)
-	fmt.Println(`
+	fmt.Printf(`
 Examples (note that the examples are done in the America/Los_Angeles /
 PST8PDT time zone):
 
@@ -134,6 +134,7 @@ PST8PDT time zone):
 	  (Converting from GMT (offset +0000) to UTC (offset +0000).)
 	  ==================================================================
 	  2016-06-14 23:46 = 2016-06-14 23:46
+
 `)
 }
 

sbuf/sbuf_test.go

@@ -168,7 +168,7 @@ func TestRWByte(t *testing.T) {
 	}
 
 	if c != 42 {
-		t.Fatal("Expected 42, have %d", c)
+		t.Fatalf("Expected 42, have %d", c)
 	}
 
 	_, err = buf.ReadByte()