Markup displayed in the Lwt_unix documentation

[Emm]

See for instance on http://ocsigen.org/lwt/2.5.1/api/Lwt_unix the documentation for the async_method type:

type async_method =  
| Async_none
(* <<div class="odocwiki_info"|~System calls are made synchronously~, and may block the entire program~. >> *)
| Async_detach
(* <<div class="odocwiki_info"|~System calls are made in another system thread~, thus without blocking other ~Lwt threads~. ~The drawback is that it may degrade performance in some cases~. ~This is the default~. >> *)
| Async_switch
(* <<div class="odocwiki_info"|~System calls are made in the main thread~, and if one blocks the execution continue in another system thread~. ~This method is the most efficient~, also you will get better performance if you force all threads to run on the same cpu~. ~On linux this can be done by using the command <<span class="odocwiki_inlinecode"|taskset>>~. ~Note that this method is still experimental~. >> *)