gofmt, govet, run those in Travis, add 1.7

.travis.yml

@@ -1,9 +1,13 @@
 language: go
-go:
-  - 1.4.3
-  - 1.5.4
-  - 1.6.3
-  - tip
+
+matrix:
+  include:
+    - go: 1.4.3
+      env: NOVET=true # No bundled vet.
+    - go: 1.5.4
+    - go: 1.6.3
+    - go: 1.7
+    - go: tip
 
 matrix:
   allow_failures:
@@ -16,3 +20,7 @@ before_install:
 script:
   - PATH=$PATH:$PWD/bin go test -v ./...
   - go build
+  - diff -u <(echo -n) <(gofmt -d -s .)
+  - if [ -z $NOVET ]; then
+      diff -u <(echo -n) <(go tool vet . 2>&1 | grep -vE 'ExampleCommand|bash_completions.*Fprint');
+    fi

bash_completions_test.go

@@ -155,7 +155,7 @@ func TestBashCompletionHiddenFlag(t *testing.T) {
 	cmdTrue.GenBashCompletion(out)
 	bashCompletion := out.String()
 	if strings.Contains(bashCompletion, flagName) {
-		t.Error("expected completion to not include %q flag: Got %v", flagName, bashCompletion)
+		t.Errorf("expected completion to not include %q flag: Got %v", flagName, bashCompletion)
 	}
 }
 

cobra_test.go

@@ -916,15 +916,14 @@ func TestRootUnknownCommand(t *testing.T) {
 
 func TestRootUnknownCommandSilenced(t *testing.T) {
 	r := noRRSetupTestSilenced("bogus")
-	s := "Run 'cobra-test --help' for usage.\n"
 
 	if r.Output != "" {
-		t.Errorf("Unexpected response.\nExpecting to be:\n %q\nGot:\n %q\n", s, r.Output)
+		t.Errorf("Unexpected response.\nExpecting to be: \n\"\"\n Got:\n %q\n", r.Output)
 	}
 
 	r = noRRSetupTestSilenced("--strtwo=a bogus")
 	if r.Output != "" {
-		t.Errorf("Unexpected response.\nExpecting to be:\n %q\nGot:\n %q\n", s, r.Output)
+		t.Errorf("Unexpected response.\nExpecting to be:\n\"\"\nGot:\n %q\n", r.Output)
 	}
 }
 

command_test.go

@@ -142,11 +142,11 @@ func TestCommandsAreSorted(t *testing.T) {
 
 	var tmpCommand = &Command{Use: "tmp"}
 
-	for _, name := range(originalNames) {
+	for _, name := range originalNames {
 		tmpCommand.AddCommand(&Command{Use: name})
 	}
 
-	for i, c := range(tmpCommand.Commands()) {
+	for i, c := range tmpCommand.Commands() {
 		if expectedNames[i] != c.Name() {
 			t.Errorf("expected: %s, got: %s", expectedNames[i], c.Name())
 		}
@@ -162,11 +162,11 @@ func TestEnableCommandSortingIsDisabled(t *testing.T) {
 
 	var tmpCommand = &Command{Use: "tmp"}
 
-	for _, name := range(originalNames) {
+	for _, name := range originalNames {
 		tmpCommand.AddCommand(&Command{Use: name})
 	}
 
-	for i, c := range(tmpCommand.Commands()) {
+	for i, c := range tmpCommand.Commands() {
 		if originalNames[i] != c.Name() {
 			t.Errorf("expected: %s, got: %s", originalNames[i], c.Name())
 		}