09/10: gnu: r-rmarkdown: Use Pandoc 1.

[Ricardo Wurmus]

rekado pushed a commit to branch master
in repository guix.

commit 5e51c268e46710b76c1d2fdb9b48ffea91f80584
Author: Ricardo Wurmus <address@hidden>
Date:   Tue Mar 13 17:26:14 2018 +0100

    gnu: r-rmarkdown: Use Pandoc 1.
    
    * gnu/packages/statistics.scm (r-rmarkdown)[propagated-inputs]: Replace
    "ghc-pandoc" with "ghc-pandoc-1".
---
 gnu/packages/statistics.scm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index af69703..5a7e76c 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -2592,7 +2592,11 @@ certain criterion, e.g., it contains a certain regular 
file.")
        ("r-rprojroot" ,r-rprojroot)
        ("r-stringr" ,r-stringr)
        ("r-yaml" ,r-yaml)
-       ("ghc-pandoc" ,ghc-pandoc)))
+       ;; rmarkdown works with the 2.x release of Pandoc, but with degraded
+       ;; functionality.  For example, tabbed plots do not currently work with
+       ;; Pandoc 2.  The authors of rmarkdown recommend the use of Pandoc 1
+       ;; for the time being.
+       ("ghc-pandoc" ,ghc-pandoc-1)))
     (home-page "http://rmarkdown.rstudio.com";)
     (synopsis "Convert R Markdown documents into a variety of formats")
     (description