Fix non-paragraph elements in divs

[jefelino]

This addresses issue #9.

This patch changes the behavior of the script in all cases. The previous behavior was to add a RawInline element to the beginning of the first child of a Div, and another RawInline element to the end of the last child. This behavior made sense if the first and last children were Plain or Para, but in general could break, leading to a crash.

The new behavior is to add a RawBlock child as the first child of the Div, and another RawBlock as the last child. The existing child nodes are unmodified. (This approach also simplifies the code.)

It looks like in latex output this has the effect of including some extra newlines surrounding the raw latex code. In latex output this may result in some extra whitespace, depending on the environment. Since the pandoc latex writer seems to add newlines to pretty much any top-level element (RawBlock, Plain) this seems hard to avoid. But I may be missing something.

[coveralls]

Coverage increased (+0.8%) to 94.595% when pulling 5cdb188 on jefelino:fix-lists-in-divs into 002d57c on chdemko:master.

[coveralls]

Coverage increased (+0.8%) to 94.595% when pulling 5cdb188 on jefelino:fix-lists-in-divs into 002d57c on chdemko:master.

[coveralls]

Coverage increased (+0.8%) to 94.595% when pulling 5cdb188 on jefelino:fix-lists-in-divs into 002d57c on chdemko:master.

[jefelino]

I see that pull request #10 addresses the same issue. My patch is basically the same as that one. The main difference is that I use RawBlock instead of a Para containing a RawInline. That doesn't seem to make any difference to current latex output, but strikes me as more correct in principle. That version (the "streamlined" one) also modifies the list of children in-place, which might be more efficient. I also updated the tests. Otherwise I think they're identical.

[rokk4]

Please merge this.
I really need this 💯

[rokk4]

For search engine visitors, use:
pip3 install https://github.com/jefelino/pandoc-latex-environment/archive/fix-lists-in-divs.zip
To get it working.

[chdemko]

Fix in code