'else' is not dedented in nested 'if' statements

[audriusk]

After 2c38ff0 commit writing else: in nested if statement doesn't dedent it automatically.

if foo:
    if bar:
        baz = True

If we insert new line at the end of this block and start writing else:, it stays at the same indentation level as the line above:

if foo:
    if bar:
        baz = True
        else:  # Should be dedented by one indentation level.

[blueyed]

Thanks for the report!

#59 should fix it.