Ensure build.sbt ends in newline

[Blaisorblade]

Rationale: Unix tools (including git) hate files which don't end with a newline.

To allow this, remove the call to trim(). I verified that the resulting
build.sbt contains no superfluous whitespace. In fact, before this
commit trim had no effect since its argument was already trimmed.

[Blaisorblade]

Rationale: Unix tools (including git) hate files which don't end with a newline.

To clarify: I'd like the second thing I do when creating a project wouldn't be fixing the output of np.

Because np is otherwise a cool idea (and I generally like lots of your stuff).

[softprops]

merged.