Short answer
Because no one has added!
Longer answer
Many suggestions were made for a larger I / O library, but the best API to use turned out to be controversial. In particular, the exact way to handle newline when reading a file line by line is a sensitive subject. (for example, should they be deleted or transmitted via as-is? If not, should skipped lines be skipped?)
This usually encourages third-party libraries that address different needs.
Having said all this ... you can check the jsuereth suggestion on github: https://github.com/jsuereth/scala-arm/wiki
Kevin wright
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