cli/formatter: fix unbracketed IPv6 addrs

Commit 964155c tried to enclose all IPv6 addresses within brackets but
missed some cases. This commit fixes that, and adds a few test cases.

Signed-off-by: Albin Kerouanton <albinker@gmail.com>

Author: akerouanton

cli/command/formatter/container.go

@@ -375,7 +375,7 @@ func formGroup(key string, start, last uint16) string {
 		group = fmt.Sprintf("%s-%d", group, last)
 	}
 	if ip != "" {
-		group = fmt.Sprintf("%s:%s->%s", ip, group, group)
+		group = fmt.Sprintf("%s->%s", net.JoinHostPort(ip, group), group)
 	}
 	return group + "/" + groupType
 }

cli/command/formatter/container_test.go

@@ -589,6 +589,17 @@ func TestDisplayablePorts(t *testing.T) {
 			},
 			expected: "4.3.2.1:8899->9988/tcp",
 		},
+		{
+			ports: []container.Port{
+				{
+					IP:          "::1",
+					PrivatePort: 9988,
+					PublicPort:  8899,
+					Type:        "tcp",
+				},
+			},
+			expected: "[::1]:8899->9988/tcp",
+		},
 		{
 			ports: []container.Port{
 				{
@@ -600,6 +611,17 @@ func TestDisplayablePorts(t *testing.T) {
 			},
 			expected: "4.3.2.1:9988->9988/tcp",
 		},
+		{
+			ports: []container.Port{
+				{
+					IP:          "::1",
+					PrivatePort: 9988,
+					PublicPort:  9988,
+					Type:        "tcp",
+				},
+			},
+			expected: "[::1]:9988->9988/tcp",
+		},
 		{
 			ports: []container.Port{
 				{
@@ -628,6 +650,22 @@ func TestDisplayablePorts(t *testing.T) {
 			},
 			expected: "1.2.3.4:9998-9999->9998-9999/udp",
 		},
+		{
+			ports: []container.Port{
+				{
+					IP:          "::1",
+					PublicPort:  9998,
+					PrivatePort: 9998,
+					Type:        "udp",
+				}, {
+					IP:          "::1",
+					PublicPort:  9999,
+					PrivatePort: 9999,
+					Type:        "udp",
+				},
+			},
+			expected: "[::1]:9998-9999->9998-9999/udp",
+		},
 		{
 			ports: []container.Port{
 				{
@@ -644,6 +682,22 @@ func TestDisplayablePorts(t *testing.T) {
 			},
 			expected: "1.2.3.4:8887->9998/udp, 1.2.3.4:8888->9999/udp",
 		},
+		{
+			ports: []container.Port{
+				{
+					IP:          "::1",
+					PublicPort:  8887,
+					PrivatePort: 9998,
+					Type:        "udp",
+				}, {
+					IP:          "::1",
+					PublicPort:  8888,
+					PrivatePort: 9999,
+					Type:        "udp",
+				},
+			},
+			expected: "[::1]:8887->9998/udp, [::1]:8888->9999/udp",
+		},
 		{
 			ports: []container.Port{
 				{
@@ -688,9 +742,14 @@ func TestDisplayablePorts(t *testing.T) {
 					PrivatePort: 2233,
 					PublicPort:  3322,
 					Type:        "tcp",
+				}, {
+					IP:          "::1",
+					PrivatePort: 2233,
+					PublicPort:  3322,
+					Type:        "tcp",
 				},
 			},
-			expected: "4.3.2.1:3322->2233/tcp, 1.2.3.4:8899->9988/tcp, 1.2.3.4:8899->9988/udp",
+			expected: "4.3.2.1:3322->2233/tcp, [::1]:3322->2233/tcp, 1.2.3.4:8899->9988/tcp, 1.2.3.4:8899->9988/udp",
 		},
 		{
 			ports: []container.Port{