Chapter references appear as ?? when chapter titles contain

[ismayc]

I'd like to have some R package names appear in the names of chapters in a book with the code format provided via the backticks around them. Unfortunately, when I try to create links to these chapters via \@ref(chapname), I receive ?? in PDF and HTML versions of the built book. The links do work when you click on them.

I tested this with bookdown-demo and received a similar error when I changed the first line of 01-intro.Rmd from "# Introduction {#intro}" to "# Introduction with `tidyverse` {#intro}". The cross-reference that appears on the next line of text (Chapter \@ref(intro) ) produces the ?? I referred to earlier.

My session info is below:

> devtools::session_info()
Session info ------------------------------------------------------------------------------
 setting  value                       
 version  R version 3.3.2 (2016-10-31)
 system   x86_64, darwin13.4.0        
 ui       RStudio (1.0.136)           
 language (EN)                        
 collate  en_US.UTF-8                 
 tz       America/New_York            
 date     2017-01-09                  

Packages ----------------------------------------------------------------------------------
 package   * version date       source        
 backports   1.0.4   2016-10-24 CRAN (R 3.3.0)
 bookdown    0.3     2016-11-28 CRAN (R 3.3.2)
 devtools    1.12.0  2016-06-24 CRAN (R 3.3.0)
 digest      0.6.11  2017-01-03 CRAN (R 3.3.2)
 evaluate    0.10    2016-10-11 CRAN (R 3.3.0)
 htmltools   0.3.5   2016-03-21 CRAN (R 3.3.0)
 knitr       1.15.1  2016-11-22 CRAN (R 3.3.2)
 magrittr    1.5     2014-11-22 CRAN (R 3.3.0)
 memoise     1.0.0   2016-01-29 CRAN (R 3.3.0)
 needs     * 0.0.3   2016-03-28 CRAN (R 3.3.0)
 Rcpp        0.12.8  2016-11-17 CRAN (R 3.3.2)
 rmarkdown   1.3     2016-12-21 CRAN (R 3.3.2)
 rprojroot   1.1     2016-10-29 CRAN (R 3.3.0)
 stringi     1.1.2   2016-10-01 CRAN (R 3.3.0)
 stringr     1.1.0   2016-08-19 CRAN (R 3.3.0)
 webshot     0.4.0   2016-12-27 CRAN (R 3.3.2)
 withr       1.0.2   2016-06-20 CRAN (R 3.3.0)
 yaml        2.1.14  2016-11-12 CRAN (R 3.3.2)

[yihui]

I think this is the same issue as jgm/pandoc#2878 When the last element in the heading is a <code>, the attributes will be applied to the code. Perhaps you can change `tidyverse` (an R package name) to Tidyverse (a general name).

[ismayc]

OK, change has been made to tidyverse instead of tidyverse.

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