Fix ignored continued=false in parse()

[ggarza]

This fixes a situation where the continued=false option in parse() was
ignored during notebook export.

The code can further be cleaned up by combining the block changed with the next block in an if-else-end block. However, I went with the most minimal change here.

This partially addresses #41.

[fredrikekre]

Hello @ggarza and thanks for the PR! I'm sorry, I completely forgot about this one. I just reworked the "continued" code in 36e8c21 so the code-block you change here is removed now. Did you have a specific example where you got an error? Could be worth to see if it fixed by the commit.

[ggarza]

I believe your commit addresses the same thing. You can close this.

Thanks.

[fredrikekre]

Great, thanks again, and sorry for being slow!