Pipe character for listing options - Fully implemented and tested.

test/Spectre.Console.Cli.Tests/Expectations/Help/Root_Command.Output.verified.txt

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+DESCRIPTION:
+The horse command.
+
+USAGE:
+    myapp horse [LEGS] [OPTIONS]
+
+ARGUMENTS:
+    [LEGS]    The number of legs
+
+OPTIONS:
+                           DEFAULT
+    -h, --help                         Prints help information
+    -v, --version                      Prints version information
+    -a, --alive                        Indicates whether or not the animal is alive
+    -n, --name <VALUE>
+    -d, --day <MON|TUE>
+        --file             food.txt
+        --directory