UI Updates with a few minor fixups scattered here and there

internal/app/wwctl/overlay/show/root.go

@@ -6,12 +6,13 @@ import (
 
 var (
 	baseCmd = &cobra.Command{
-		Use:                "show",
-		Short:              "Show Warewulf Overlay objects",
-		Long:               "Warewulf show overlay objects",
-		RunE:				CobraRunE,
-		Aliases: 			[]string{"cat"},
-		Args: 				cobra.ExactArgs(2),
+		Use:   "show [flags] <overlay name> <overlay file>",
+		Short: "Show (cat) a file within a Warewulf Overlay",
+		Long: "This command will output the contents of a file within a given\n" +
+			"Warewulf overlay.",
+		RunE:    CobraRunE,
+		Aliases: []string{"cat"},
+		Args:    cobra.ExactArgs(2),
 	}
 	SystemOverlay bool
 )
@@ -23,4 +24,4 @@ func init() {
 // GetRootCommand returns the root cobra.Command for the application.
 func GetCommand() *cobra.Command {
 	return baseCmd
-}
+}