error msg fixes

Miscellaneous error message tweaks.
Makes the error message displayed in `kubectl get` more visible.
Returns exit code 1 if a patch fails.

pkg/kubectl/cmd/cmd.go

@@ -239,7 +239,8 @@ __custom_func() {
     * services (aka 'svc')
     * statefulsets
     * storageclasses
-    `
+
+`
 )
 
 var (

pkg/kubectl/cmd/patch.go

@@ -183,6 +183,7 @@ func RunPatch(f cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []strin
 
 		if !options.Local {
 			dataChangedMsg := "not patched"
+			didPatch := false
 			helper := resource.NewHelper(client, mapping)
 			patchedObj, err := helper.Patch(namespace, name, patchType, patchBytes)
 			if err != nil {
@@ -213,6 +214,7 @@ func RunPatch(f cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []strin
 				return err
 			}
 			if !reflect.DeepEqual(oldData, newData) {
+				didPatch = true
 				dataChangedMsg = "patched"
 			}
 
@@ -229,6 +231,12 @@ func RunPatch(f cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []strin
 				return err
 			}
 			cmdutil.PrintSuccess(mapper, options.OutputFormat == "name", out, info.Mapping.Resource, info.Name, false, dataChangedMsg)
+
+			// if object was not successfully patched, exit with error code 1
+			if !didPatch {
+				return cmdutil.ErrExit
+			}
+
 			return nil
 		}