Links Cannot Be Added Within Strings

[jrg94]

We ran into this issue with punctuation (#18), and I'm realizing that this issue is bigger than I thought. I'm not sure how to solve this at the moment, but something to think about for sure. The particular issue that I'm noticing is that we can't even embed links in the middle of structures. For example, I can't do this with SnakeMD:

[[Link](https://test.com)]

This will render with spaces on either end as follows:

[ [Link](https://test.com) ]

This turned out to be the same issue we were having with punctuation, and I already didn't like the regex then.

[jrg94]

Alright, in v0.4.0, I'm have fixed this by removing the automatic spaces between InlineText objects in paragraphs. The user will be responsible for formatting their strings correctly (e.g., leaving a space at the end of the previous string).