<et-al font-style="italic"/> not honoured

[njbart]

Using CSL styles with <et-al font-style="italic"/>, pandoc does not render the "et al." part of in-text citations in italics.

See http://citationstyles.org/downloads/specification.html#et-al

Example:

pandoc -s -F pandoc-citeproc -t markdown-citations << EOT

---
csl: taylor-and-francis-harvard-x.csl
#csl: genetics.csl
#csl: oxford-studies-on-the-roman-economy.csl
references:
- id: article
  type: article-journal
  author:
  - family: Doe
    given: John F.
  - family: Moe
    given: John F.
  - family: Xoe
    given: John F.
  - family: Yoe
    given: John F.
  title: Articletitle
  container-title: Journaltitle
  issued:
    date-parts:
    - - 2006
...

# Text

@article

# References

EOT

Expected output:

Text
====

Doe *et al.* (2006)

<div class="references">

References {#references .unnumbered}
==========

Doe, J.F., Moe, J.F., Xoe, J.F., and Yoe, J.F., 2006. Articletitle.
*Journaltitle*.

</div>

Actual output:

Text
====

Doe et al. (2006)

<div class="references">

References {#references .unnumbered}
==========

Doe, J.F., Moe, J.F., Xoe, J.F., and Yoe, J.F., 2006. Articletitle.
*Journaltitle*.

</div>

[jgm]

Partial diagnosis: The emphasis is there after collapseCitGroups in the citeproc function, but missing after map (formatCitLayout s). It's being removed by the rmFormatting in localModifiers.