message: clean up command-line documentation
diff: @@ -31,9 +31,9 @@ It is important to note that the arguments passed to `ospInit()` are
  processed in order they are listed. The following parameters (which are
  prefixed by convention with "`--osp:`") are understood:
  - -------------------------------------------------------------- -----------------------------------------------------
  + -------------------------------------------- -----------------------------------------------------
  Parameter Description
  - -------------------------------------------------------------- -----------------------------------------------------
  + -------------------------------------------- -----------------------------------------------------
  `--osp:debug` enables various extra checks and debug output, and
  disables multi-threading
  @@ -49,7 +49,7 @@ prefixed by convention with "`--osp:`") are understood:
  `--osp:vv` shortcut for `--osp:log-level=2` and enable debug
  output on console
  - `--osp:load-modules=<name>[,<name>...]` load one or more modules during initialization;
  + `--osp:load-modules=<name>[,...]` load one or more modules during initialization;
  equivalent to calling `ospLoadModule(name)`
  `--osp:log-output=<dst>` convenience for setting where status messages go;
  @@ -68,8 +68,9 @@ prefixed by convention with "`--osp:`") are understood:
  `0` disables binding; default is `1` on KNL and `0`
  otherwise
  - `--osp:device-params=<param1>:<value1>[,<param2>:<value2>...]` set one or more other device parameters
  - -------------------------------------------------------------- -----------------------------------------------------
  + `--osp:device-params=<param>:<value>[,...]` set one or more other device parameters; equivalent
  + to calling `ospDeviceSet*(param, value)`
  + -------------------------------------------- -----------------------------------------------------
  : Command line parameters accepted by OSPRay's `ospInit`.
  ### Manual Device Instantiation
  