Fix up alignment of columns w/ namespaces.

Fixes #10842

All issues for types that use "extra lines" for extended information.  Two issues fixed: (1) When namespaces are listed an extra column isn't inserted for extra lines and (2) trailing tabs aren't inserted when label columns are specified.

This code should probably move to a more explicit model of putting data into "cells".

The test for this hits https://github.com/golang/go/issues/6416 and so I introduced a "LineDelimiter" writer filter to make white space more visible.

pkg/util/line_delimiter_test.go

@@ -0,0 +1,40 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"fmt"
+	"os"
+)
+
+func ExampleTrailingNewline() {
+	ld := NewLineDelimiter(os.Stdout, "|")
+	defer ld.Flush()
+	fmt.Fprint(ld, "  Hello  \n  World  \n")
+	// Output:
+	// |  Hello  |
+	// |  World  |
+	// ||
+}
+func ExampleNoTrailingNewline() {
+	ld := NewLineDelimiter(os.Stdout, "|")
+	defer ld.Flush()
+	fmt.Fprint(ld, "  Hello  \n  World  ")
+	// Output:
+	// |  Hello  |
+	// |  World  |
+}