sbr — An explicit line break in a command synopsis
sbr ::= EMPTY
For the most part, DocBook attempts to describe document structure rather than presentation. However, in some complex environments, it is possible to demonstrate that there is no reasonable set of processing expectations that can guarantee correct formatting.
CmdSynopsis is one of those environments. Within a long
synopsis, it may be necessary to specify the location of a line break
SBR causes a line break.