Mid-paragraph punctuation has weird line breaks

### Context

Due to the discussion in #52, the following lines were added to `typeset.css`:

```css
.pull-double, .push-double,
.pull-single, .push-single {display: inline-block}
```

The quoted reason was that mid-paragraph punctuation was not hanging properly. See `"Thrice`:

### Bug

These `inline-block` styles cause a problem.

If `typeset.css` includes these lines, then the `"` character is not rendered on the same line as the word it attaches to:

As it happens, the version of `typeset.css` which is [currently being served](https://typeset.lllllllllllllllll.com/typeset.css) on the demo **does not** include any `inline-block` styling—I had to explicitly add the `inline-block` styles in the web inspector to take this screenshot.

**But**, this does not appear to matter? The original bug reported in #52 does not reproduce for me in Chrome, Firefox, nor Safari on macOS. That is: the `typeset.css` file that's currently being served in the demo is sufficient to get mid-paragraph quotes to hang into the margin:

It would seem that these styles are no longer relevant. I'm not sure what would have changed here—maybe the original bug was reported when there was a bug in Chrome that has since been fixed?

### Solution(s)

It should be sufficient to edit the README.md and the copies of `typeset.css` in this repo to drop any lines adding an `inline-block` style to the push/pull spans. This is what I will be doing in my own uses of this project.

It's also worth noting that in this comment: https://github.com/davidmerfield/Typeset/issues/52#issuecomment-549481082 mbutterick mentioned that his suggestion for fixing the original bug was to only have the `inline-block` on the push spans, not the pull spans. That appears to also work: mid-paragraph punctuation both hangs and also wraps alongside the following word.