adjust line number mixin so it postpones recomputation of sizes until the end of an edit sequence (when appropriate)
adjust line number mixin so it postpones recomputation of
sizes until the end of an edit sequence (when appropriate)

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