Modify 'code-block' tag format so that the following python code
could be showed exactly, and reformat the more than 79 chars of lines.
Change-Id: Ic6721e4cc8f4c7a3e4a7c7dbd63d9089180cdc33
This is a follow-up to I6c750730963615895f5d9953487d2d5a905885a8 that
removed a command deprecation warning wrapper. This documents the
technique for later use.
Change-Id: Ieaa1e6b7eed4e5b037b4bfb6cf488e1290fc69f7