Unnecessary blank line for one-line declarations

[andreaferretti]

When let or var is followed by a value, it is (I think) invalid to have more values following in the same block. In this case, it makes sense to evaluate the line immediately without requiring blank lines

example:

> let x = 1
-

Here there is no need for the - line

[wheineman]

I will address in the next release.

[wheineman]

Fixed in version 0.1.4