Changes

val t1SentenceCount = text1.flatMap(line => line.split("")).filter(character => character.matches("[.!?]")).count()

val t1CommaCount = text1.flatMap(line => line.split("")).filter(character => character.matches("[,]")).count()

val t1ColonCount = text1.flatMap(line => line.split("")).filter(character => character.matches("[:;]")).count()

val t1CharacterCount = text1.flatMap(line => line.split("")).count()