fixup! Add word-wrap support, with wrap length provided by the user

show that user-defined indented lines also work as expected

help_test.go

@@ -927,9 +927,13 @@ func TestWrappedHelp(t *testing.T) {
 		Usage:     "here's a sample App.Usage string long enough that it should be wrapped in this test",
 		UsageText: "i'm not sure how App.UsageText differs from App.Usage, but this should also be wrapped in this test",
 		// TODO: figure out how to make ArgsUsage appear in the help text, and test that
-		Description: "here's a sample App.Description string long enough that it should be wrapped in this test",
+		Description: `here's a sample App.Description string long enough that it should be wrapped in this test
+
+with a newline
+   and an indented line`,
 		Copyright: `Here's a sample copyright text string long enough that it should be wrapped.
 Including newlines.
+   And also indented lines.
 
 
 And then another long line. Blah blah blah does anybody ever read these things?`,
@@ -967,6 +971,9 @@ DESCRIPTION:
    App.Description string long
    enough that it should be
    wrapped in this test
+   
+   with a newline
+      and an indented line
 
 GLOBAL OPTIONS:
    --foo, -h here's a
@@ -981,6 +988,7 @@ COPYRIGHT:
    text string long enough
    that it should be wrapped.
    Including newlines.
+      And also indented lines.
    
    
    And then another long line.