bug#7947: Does sh-script.el recognize new case grammar ; & and ; ; & ?

[jidanni]

>>>>> "SM" == Stefan Monnier <monnier@iro.umontreal.ca> writes:
SM> a reference describing what it means

$ man bash|grep ';&'
              matches are attempted after the first pattern match.  Using ;& in 
place of ;; causes execution to continue
              with the list associated with the next set of patterns.  Using 
;;& in place of ;; causes the shell to test
Also on Debian in /usr/share/doc/abs-guide/examples/case4.sh

All I know is indenting seems funny around them when using emacs'
sh-script.el .