diff --git a/bool_slice.go b/bool_slice.go
index 3731370d..06e0f50e 100644
--- a/bool_slice.go
+++ b/bool_slice.go
@@ -22,7 +22,6 @@ func newBoolSliceValue(val []bool, p *[]bool) *boolSliceValue {
 // Set converts, and assigns, the comma-separated boolean argument string representation as the []bool value of this flag.
 // If Set is called on a flag that already has a []bool assigned, the newly converted values will be appended.
 func (s *boolSliceValue) Set(val string) error {
-
 	// remove all quote characters
 	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
 
@@ -60,7 +59,6 @@ func (s *boolSliceValue) Type() string {
 
 // String defines a "native" format for this boolean slice flag value.
 func (s *boolSliceValue) String() string {
-
 	boolStrSlice := make([]string, len(*s.value))
 	for i, b := range *s.value {
 		boolStrSlice[i] = strconv.FormatBool(b)
diff --git a/bool_slice_test.go b/bool_slice_test.go
index 3c5a274f..e6873b75 100644
--- a/bool_slice_test.go
+++ b/bool_slice_test.go
@@ -184,7 +184,6 @@ func TestBSAsSliceValue(t *testing.T) {
 }
 
 func TestBSBadQuoting(t *testing.T) {
-
 	tests := []struct {
 		Want    []bool
 		FlagArg []string
diff --git a/bytes.go b/bytes.go
index 67d53045..6856088a 100644
--- a/bytes.go
+++ b/bytes.go
@@ -18,7 +18,6 @@ func (bytesHex bytesHexValue) String() string {
 // Set implements pflag.Value.Set.
 func (bytesHex *bytesHexValue) Set(value string) error {
 	bin, err := hex.DecodeString(strings.TrimSpace(value))
-
 	if err != nil {
 		return err
 	}
@@ -39,7 +38,6 @@ func newBytesHexValue(val []byte, p *[]byte) *bytesHexValue {
 }
 
 func bytesHexConv(sval string) (interface{}, error) {
-
 	bin, err := hex.DecodeString(sval)
 
 	if err == nil {
@@ -52,7 +50,6 @@ func bytesHexConv(sval string) (interface{}, error) {
 // GetBytesHex return the []byte value of a flag with the given name
 func (f *FlagSet) GetBytesHex(name string) ([]byte, error) {
 	val, err := f.getFlagType(name, "bytesHex", bytesHexConv)
-
 	if err != nil {
 		return []byte{}, err
 	}
@@ -119,7 +116,6 @@ func (bytesBase64 bytesBase64Value) String() string {
 // Set implements pflag.Value.Set.
 func (bytesBase64 *bytesBase64Value) Set(value string) error {
 	bin, err := base64.StdEncoding.DecodeString(strings.TrimSpace(value))
-
 	if err != nil {
 		return err
 	}
@@ -140,7 +136,6 @@ func newBytesBase64Value(val []byte, p *[]byte) *bytesBase64Value {
 }
 
 func bytesBase64ValueConv(sval string) (interface{}, error) {
-
 	bin, err := base64.StdEncoding.DecodeString(sval)
 	if err == nil {
 		return bin, nil
@@ -152,7 +147,6 @@ func bytesBase64ValueConv(sval string) (interface{}, error) {
 // GetBytesBase64 return the []byte value of a flag with the given name
 func (f *FlagSet) GetBytesBase64(name string) ([]byte, error) {
 	val, err := f.getFlagType(name, "bytesBase64", bytesBase64ValueConv)
-
 	if err != nil {
 		return []byte{}, err
 	}
diff --git a/flag.go b/flag.go
index 7c058de3..95df6cd7 100644
--- a/flag.go
+++ b/flag.go
@@ -27,23 +27,32 @@ unaffected.
 Define flags using flag.String(), Bool(), Int(), etc.
 
 This declares an integer flag, -flagname, stored in the pointer ip, with type *int.
+
 	var ip = flag.Int("flagname", 1234, "help message for flagname")
+
 If you like, you can bind the flag to a variable using the Var() functions.
+
 	var flagvar int
 	func init() {
 		flag.IntVar(&flagvar, "flagname", 1234, "help message for flagname")
 	}
+
 Or you can create custom flags that satisfy the Value interface (with
 pointer receivers) and couple them to flag parsing by
+
 	flag.Var(&flagVal, "name", "help message for flagname")
+
 For such flags, the default value is just the initial value of the variable.
 
 After all flags are defined, call
+
 	flag.Parse()
+
 to parse the command line into the defined flags.
 
 Flags may then be used directly. If you're using the flags themselves,
 they are all pointers; if you bind to variables, they're values.
+
 	fmt.Println("ip has value ", *ip)
 	fmt.Println("flagvar has value ", flagvar)
 
@@ -54,22 +63,26 @@ The arguments are indexed from 0 through flag.NArg()-1.
 The pflag package also defines some new functions that are not in flag,
 that give one-letter shorthands for flags. You can use these by appending
 'P' to the name of any function that defines a flag.
+
 	var ip = flag.IntP("flagname", "f", 1234, "help message")
 	var flagvar bool
 	func init() {
 		flag.BoolVarP(&flagvar, "boolname", "b", true, "help message")
 	}
 	flag.VarP(&flagval, "varname", "v", "help message")
+
 Shorthand letters can be used with single dashes on the command line.
 Boolean shorthand flags can be combined with other shorthand flags.
 
 Command line flag syntax:
+
 	--flag    // boolean flags only
 	--flag=x
 
 Unlike the flag package, a single dash before an option means something
 different than a double dash. Single dashes signify a series of shorthand
 letters for flags. All but the last shorthand letter must be boolean flags.
+
 	// boolean flags
 	-f
 	-abc
@@ -365,7 +378,7 @@ func (f *FlagSet) ShorthandLookup(name string) *Flag {
 	}
 	if len(name) > 1 {
 		msg := fmt.Sprintf("can not look up shorthand which is more than one ASCII character: %q", name)
-		fmt.Fprintf(f.Output(), msg)
+		fmt.Fprintln(f.Output(), msg)
 		panic(msg)
 	}
 	c := name[0]
@@ -675,7 +688,6 @@ func wrap(i, w int, s string) string {
 	}
 
 	return r
-
 }
 
 // FlagUsagesWrapped returns a string containing the usage information
@@ -867,7 +879,7 @@ func (f *FlagSet) AddFlag(flag *Flag) {
 	}
 	if len(flag.Shorthand) > 1 {
 		msg := fmt.Sprintf("%q shorthand is more than one ASCII character", flag.Shorthand)
-		fmt.Fprintf(f.Output(), msg)
+		fmt.Fprintln(f.Output(), msg)
 		panic(msg)
 	}
 	if f.shorthands == nil {
@@ -877,7 +889,7 @@ func (f *FlagSet) AddFlag(flag *Flag) {
 	used, alreadyThere := f.shorthands[c]
 	if alreadyThere {
 		msg := fmt.Sprintf("unable to redefine %q shorthand in %q flagset: it's already used for %q flag", c, f.name, used.Name)
-		fmt.Fprintf(f.Output(), msg)
+		fmt.Fprintln(f.Output(), msg)
 		panic(msg)
 	}
 	f.shorthands[c] = flag
@@ -934,9 +946,9 @@ func (f *FlagSet) usage() {
 	}
 }
 
-//--unknown (args will be empty)
-//--unknown --next-flag ... (args will be --next-flag ...)
-//--unknown arg ... (args will be arg ...)
+// --unknown (args will be empty)
+// --unknown --next-flag ... (args will be --next-flag ...)
+// --unknown arg ... (args will be arg ...)
 func stripUnknownFlagValue(args []string) []string {
 	if len(args) == 0 {
 		//--unknown
@@ -1135,7 +1147,7 @@ func (f *FlagSet) Parse(arguments []string) error {
 	}
 	f.parsed = true
 
-	if len(arguments) < 0 {
+	if len(arguments) == 0 {
 		return nil
 	}
 
diff --git a/flag_test.go b/flag_test.go
index 58a5d25a..af762a8b 100644
--- a/flag_test.go
+++ b/flag_test.go
@@ -433,7 +433,7 @@ func testParseWithUnknownFlags(f *FlagSet, t *testing.T) {
 		"-u=unknown3Value",
 		"-p",
 		"unknown4Value",
-		"-q", //another unknown with bool value
+		"-q", // another unknown with bool value
 		"-y",
 		"ee",
 		"--unknown7=unknown7value",
@@ -899,7 +899,7 @@ func TestChangingArgs(t *testing.T) {
 
 // Test that -help invokes the usage message and returns ErrHelp.
 func TestHelp(t *testing.T) {
-	var helpCalled = false
+	helpCalled := false
 	fs := NewFlagSet("help test", ContinueOnError)
 	fs.Usage = func() { helpCalled = true }
 	var flag bool
@@ -998,6 +998,7 @@ func getDeprecatedFlagSet() *FlagSet {
 	f.MarkDeprecated("badflag", "use --good-flag instead")
 	return f
 }
+
 func TestDeprecatedFlagInDocs(t *testing.T) {
 	f := getDeprecatedFlagSet()
 
@@ -1134,7 +1135,6 @@ func TestMultipleNormalizeFlagNameInvocations(t *testing.T) {
 	}
 }
 
-//
 func TestHiddenFlagInUsage(t *testing.T) {
 	f := NewFlagSet("bob", ContinueOnError)
 	f.Bool("secretFlag", true, "shhh")
@@ -1149,7 +1149,6 @@ func TestHiddenFlagInUsage(t *testing.T) {
 	}
 }
 
-//
 func TestHiddenFlagUsage(t *testing.T) {
 	f := NewFlagSet("bob", ContinueOnError)
 	f.Bool("secretFlag", true, "shhh")
@@ -1238,9 +1237,7 @@ func TestPrintDefaults(t *testing.T) {
 	fs.PrintDefaults()
 	got := buf.String()
 	if got != defaultOutput {
-		fmt.Println("\n" + got)
-		fmt.Println("\n" + defaultOutput)
-		t.Errorf("got %q want %q\n", got, defaultOutput)
+		t.Errorf("got %q want %q", got, defaultOutput)
 	}
 }
 
diff --git a/golangflag.go b/golangflag.go
index d3dd72b7..3e47328b 100644
--- a/golangflag.go
+++ b/golangflag.go
@@ -68,7 +68,7 @@ func PFlagFromGoFlag(goflag *goflag.Flag) *Flag {
 		Usage: goflag.Usage,
 		Value: wrapFlagValue(goflag.Value),
 		// Looks like golang flags don't set DefValue correctly  :-(
-		//DefValue: goflag.DefValue,
+		// DefValue: goflag.DefValue,
 		DefValue: goflag.Value.String(),
 	}
 	// Ex: if the golang flag was -v, allow both -v and --v to work
diff --git a/ip_slice.go b/ip_slice.go
index 775faae4..23bc991d 100644
--- a/ip_slice.go
+++ b/ip_slice.go
@@ -23,7 +23,6 @@ func newIPSliceValue(val []net.IP, p *[]net.IP) *ipSliceValue {
 // Set converts, and assigns, the comma-separated IP argument string representation as the []net.IP value of this flag.
 // If Set is called on a flag that already has a []net.IP assigned, the newly converted values will be appended.
 func (s *ipSliceValue) Set(val string) error {
-
 	// remove all quote characters
 	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
 
@@ -61,7 +60,6 @@ func (s *ipSliceValue) Type() string {
 
 // String defines a "native" format for this net.IP slice flag value.
 func (s *ipSliceValue) String() string {
-
 	ipStrSlice := make([]string, len(*s.value))
 	for i, ip := range *s.value {
 		ipStrSlice[i] = ip.String()
diff --git a/ip_slice_test.go b/ip_slice_test.go
index d1892768..366dc195 100644
--- a/ip_slice_test.go
+++ b/ip_slice_test.go
@@ -165,7 +165,6 @@ func TestIPSAsSliceValue(t *testing.T) {
 }
 
 func TestIPSBadQuoting(t *testing.T) {
-
 	tests := []struct {
 		Want    []net.IP
 		FlagArg []string
@@ -222,7 +221,8 @@ func TestIPSBadQuoting(t *testing.T) {
 			},
 			FlagArg: []string{
 				`"2e5e:66b2:6441:848:5b74:76ea:574c:3a7b,        2e5e:66b2:6441:848:5b74:76ea:574c:3a7b,2e5e:66b2:6441:848:5b74:76ea:574c:3a7b     "`,
-				" 2e5e:66b2:6441:848:5b74:76ea:574c:3a7b"},
+				" 2e5e:66b2:6441:848:5b74:76ea:574c:3a7b",
+			},
 		},
 	}
 
diff --git a/ipnet_slice.go b/ipnet_slice.go
index 6b541aa8..2984dc4d 100644
--- a/ipnet_slice.go
+++ b/ipnet_slice.go
@@ -23,7 +23,6 @@ func newIPNetSliceValue(val []net.IPNet, p *[]net.IPNet) *ipNetSliceValue {
 // Set converts, and assigns, the comma-separated IPNet argument string representation as the []net.IPNet value of this flag.
 // If Set is called on a flag that already has a []net.IPNet assigned, the newly converted values will be appended.
 func (s *ipNetSliceValue) Set(val string) error {
-
 	// remove all quote characters
 	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
 
@@ -61,7 +60,6 @@ func (s *ipNetSliceValue) Type() string {
 
 // String defines a "native" format for this net.IPNet slice flag value.
 func (s *ipNetSliceValue) String() string {
-
 	ipNetStrSlice := make([]string, len(*s.value))
 	for i, n := range *s.value {
 		ipNetStrSlice[i] = n.String()
diff --git a/ipnet_slice_test.go b/ipnet_slice_test.go
index 11644c58..3b470889 100644
--- a/ipnet_slice_test.go
+++ b/ipnet_slice_test.go
@@ -159,7 +159,6 @@ func TestIPNetCalledTwice(t *testing.T) {
 }
 
 func TestIPNetBadQuoting(t *testing.T) {
-
 	tests := []struct {
 		Want    []net.IPNet
 		FlagArg []string
@@ -216,7 +215,8 @@ func TestIPNetBadQuoting(t *testing.T) {
 			},
 			FlagArg: []string{
 				`"2e5e:66b2:6441:848:5b74:76ea:574c:3a7b/128,        2e5e:66b2:6441:848:5b74:76ea:574c:3a7b/128,2e5e:66b2:6441:848:5b74:76ea:574c:3a7b/128     "`,
-				" 2e5e:66b2:6441:848:5b74:76ea:574c:3a7b/128"},
+				" 2e5e:66b2:6441:848:5b74:76ea:574c:3a7b/128",
+			},
 		},
 	}
 
diff --git a/string.go b/string.go
index 04e0a26f..c96b8020 100644
--- a/string.go
+++ b/string.go
@@ -12,6 +12,7 @@ func (s *stringValue) Set(val string) error {
 	*s = stringValue(val)
 	return nil
 }
+
 func (s *stringValue) Type() string {
 	return "string"
 }
diff --git a/string_slice.go b/string_slice.go
index 3cb2e69d..d421887e 100644
--- a/string_slice.go
+++ b/string_slice.go
@@ -98,9 +98,12 @@ func (f *FlagSet) GetStringSlice(name string) ([]string, error) {
 // The argument p points to a []string variable in which to store the value of the flag.
 // Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
 // For example:
-//   --ss="v1,v2" --ss="v3"
+//
+//	--ss="v1,v2" --ss="v3"
+//
 // will result in
-//   []string{"v1", "v2", "v3"}
+//
+//	[]string{"v1", "v2", "v3"}
 func (f *FlagSet) StringSliceVar(p *[]string, name string, value []string, usage string) {
 	f.VarP(newStringSliceValue(value, p), name, "", usage)
 }
@@ -114,9 +117,12 @@ func (f *FlagSet) StringSliceVarP(p *[]string, name, shorthand string, value []s
 // The argument p points to a []string variable in which to store the value of the flag.
 // Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
 // For example:
-//   --ss="v1,v2" --ss="v3"
+//
+//	--ss="v1,v2" --ss="v3"
+//
 // will result in
-//   []string{"v1", "v2", "v3"}
+//
+//	[]string{"v1", "v2", "v3"}
 func StringSliceVar(p *[]string, name string, value []string, usage string) {
 	CommandLine.VarP(newStringSliceValue(value, p), name, "", usage)
 }
@@ -130,9 +136,12 @@ func StringSliceVarP(p *[]string, name, shorthand string, value []string, usage
 // The return value is the address of a []string variable that stores the value of the flag.
 // Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
 // For example:
-//   --ss="v1,v2" --ss="v3"
+//
+//	--ss="v1,v2" --ss="v3"
+//
 // will result in
-//   []string{"v1", "v2", "v3"}
+//
+//	[]string{"v1", "v2", "v3"}
 func (f *FlagSet) StringSlice(name string, value []string, usage string) *[]string {
 	p := []string{}
 	f.StringSliceVarP(&p, name, "", value, usage)
@@ -150,9 +159,12 @@ func (f *FlagSet) StringSliceP(name, shorthand string, value []string, usage str
 // The return value is the address of a []string variable that stores the value of the flag.
 // Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
 // For example:
-//   --ss="v1,v2" --ss="v3"
+//
+//	--ss="v1,v2" --ss="v3"
+//
 // will result in
-//   []string{"v1", "v2", "v3"}
+//
+//	[]string{"v1", "v2", "v3"}
 func StringSlice(name string, value []string, usage string) *[]string {
 	return CommandLine.StringSliceP(name, "", value, usage)
 }