Blank line broke formatting in doc/source/user/index.rst. I therefore
deleted it.
Use code blocks instead of indentation in admin/magnum-proxy.rst
Old indentation was wrongly formated as quotation.
contributor/api-microversion.rst : Note was wrongly indented and
therefore interpreted as a quotation.
Change-Id: I47797a05be22a3b38f7994432ed75b67b6a4962a
a400ea7980