Skip smart label in kubectl describe if field has special chars

Attempts to create smart label for fields containing special chanracter ends
up looking very odd. This change skips creating smart labels for fields
containing special characters other than '-'.

pkg/kubectl/describe/versioned/describe.go

@@ -29,6 +29,7 @@ import (
 	"strings"
 	"text/tabwriter"
 	"time"
+	"unicode"
 
 	"github.com/fatih/camelcase"
 
@@ -302,8 +303,15 @@ func printUnstructuredContent(w PrefixWriter, level int, content map[string]inte
 }
 
 func smartLabelFor(field string) string {
-	commonAcronyms := []string{"API", "URL", "UID", "OSB", "GUID"}
+	// skip creating smart label if field name contains
+	// special characters other than '-'
+	if strings.IndexFunc(field, func(r rune) bool {
+		return !unicode.IsLetter(r) && r != '-'
+	}) != -1 {
+		return field
+	}
 
+	commonAcronyms := []string{"API", "URL", "UID", "OSB", "GUID"}
 	parts := camelcase.Split(field)
 	result := make([]string, 0, len(parts))
 	for _, part := range parts {

pkg/kubectl/describe/versioned/describe_test.go

@@ -2499,7 +2499,11 @@ func TestDescribeUnstructuredContent(t *testing.T) {
 	}{
 		{
 			expected: `API Version:	v1
-Dummy 2:	present
+Dummy - Dummy:	present
+dummy-dummy@dummy:	present
+dummy/dummy:	present
+dummy2:	present
+Dummy Dummy:	present
 Items:
   Item Bool:	true
   Item Int:	42
@@ -2537,10 +2541,14 @@ URL:	http://localhost
 	w := NewPrefixWriter(out)
 	obj := &unstructured.Unstructured{
 		Object: map[string]interface{}{
-			"apiVersion": "v1",
-			"kind":       "Test",
-			"dummy1":     "present",
-			"dummy2":     "present",
+			"apiVersion":        "v1",
+			"kind":              "Test",
+			"dummyDummy":        "present",
+			"dummy/dummy":       "present",
+			"dummy-dummy@dummy": "present",
+			"dummy-dummy":       "present",
+			"dummy1":            "present",
+			"dummy2":            "present",
 			"metadata": map[string]interface{}{
 				"name":              "MyName",
 				"namespace":         "MyNamespace",