Fixed whitespace issue when generating if statement

[vallentin]

Fixed #377
Closes #378

I've fixed the issue of whitespace being generated incorrectly in if statements.

I've tested all permutations from 1 to 4 branches. For which I created a Python script that generated all the permutations. I included the script as well, as it allows you to generate and test an arbitrary number of branches. (I'll use it to check match, macro, along with nested constructs later.)

I included the test cases for 1 and 2 branches.

[vallentin]

Forgot to push the updated test file.

[djc]

Once again, thank you!