Added support for LaTeX pagestyle variable (#4135)

* Add pagestyle support

* Add pagestyle option to MANUAL.txt

* Moved mention of pagestyle to the section on variables

MANUAL.txt

@@ -1,6 +1,6 @@
 % Pandoc User's Guide
 % John MacFarlane
-% December 2, 2017
+% December 8, 2017
 
 Synopsis
 ========
@@ -1532,6 +1532,11 @@ LaTeX variables are used when [creating a PDF].
 `natbiboptions`
 :   list of options for natbib.
 
+`pagestyle`
+:   An option for LaTeX's `\pagestyle{}`. The default article class
+    supports 'plain' (default), 'empty', and 'headings'; headings puts
+    section titles in the header.
+
 [`article`]: https://ctan.org/pkg/article
 [`report`]: https://ctan.org/pkg/report
 [`book`]: https://ctan.org/pkg/book

data/templates/default.latex

@@ -245,6 +245,9 @@ $else$
 \fi
 $endif$
 $endif$
+$if(pagestyle)$
+\pagestyle{$pagestyle$}
+$endif$
 
 % set default figure placement to htbp
 \makeatletter