more improvements to find a 'regmust' string (PR 9602)
more improvements to find a 'regmust' string (PR 9602)

svn: r10751

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket