Updates AMS to V5

[eliocamp]

Following #298.
I wanted to push this only after submitting and being given the A-OK from the good people at the AMS. But now it turns out I won't be submitting to that journal, so, well, here's the updated version of the AMS article template.

[CLAassistant]

All committers have signed the CLA.

[cderv]

Thanks @eliocamp ! I see there is hook you mentioned in #298. Is this a modified version of knitr::hook_plot_tex() ?

@yufree, as the original contributor, do you want to take a look at this too ?

[eliocamp]

Thanks @eliocamp ! I see there is hook you mentioned in #298. Is this a modified version of knitr::hook_plot_tex() ?

Yep. The change is that it uses appendcaption instead of caption. Is part of the instructions from the AMS template.

[yufree]

It seems the check could not pass:

! Package inputenc Error: Unicode character ≤ (U+2264)

  (inputenc)                not set up for use with LaTeX.

To solve this issue, you could change the latex engine from pdflatex to xelatex in the template to avoid the issue.

[yufree]

change here to pass the check.

output: 
  rticles::ams_article:
    latex_engine: xelatex

[cderv]

Does it mean this format has to default to xelatex ?

[yufree]

Just for this template. It seems the bib file contain unicode character which will not map to output through pdflatex. Such issue blocked the check. Since the bib file might be from ASM, we could set the default engine to xelatex to be friendly to the user.

[eliocamp]

I added xelatex as latex_engine in the skeleton.

[yihui]

Yep. The change is that it uses appendcaption instead of caption. Is part of the instructions from the AMS template.

@eliocamp If you had to copy the 150 lines of code of hook_plot_tex from knitr, modify one line, and add to this package, I'll definitely reconsider yihui/knitr#1872, because otherwise this will be a disaster for us to maintain in rticles :)

[cderv]

Sorry for the delay. V6 template for AMS is out. Should we consider V6 and abandon V5 here ?
#298 (comment)

[cderv]

I am closing this PR in favor of #444.

Thanks.