Fix asserts in format_paragraph on VC 8.0 -- the reverse iterator was

incorrectly used. Generally clean up the code.


[SVN r32133]

libs/program_options

@@ -1 +1 @@
-Subproject commit 4cde608b3ebda510cab7c141cb24438536a3a479
+Subproject commit 6e7b140c98e765df3f1fef3d9fe8febc48b79f79