pkgdown 小插图代码块间距

我在运行时遇到代码块输出问题pkgdown::build_site()与所有默认选项。块被渲染在html内容 https://mountainmath.github.io/cancensus/articles/Making_maps_with_cancensus.html每行代码之间都有多余的空格。例如：

```{r, message = FALSE}
library(leaflet)
leaflet(toronto) %>% 
  addProviderTiles(providers$CartoDB.Positron) %>%
  addPolygons()
```

出来为：

library(leaflet)


leaflet(toronto) %>% 


  addProviderTiles(providers$CartoDB.Positron) %>%


  addPolygons()

或者，以屏幕截图的形式：

我在生成的html内容中没有遇到这个问题blogdown，虽然我知道这是一个独立的包，并且README.md文件渲染也很好。

我在 pkgdown 代码块中找不到任何关于间距的提及，我想知道从哪里可以开始解决这个问题。

插图的 YAML 部分使用默认条目：

---
title: "Vignette Title"
author: "Autho"
date: "11/22/2017"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Vignette Title}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

设置块也是标准的。

```{r setup, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```

会议详情：

R version 3.4.1 (2017-06-30)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: OS X El Capitan 10.11.6

Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.4/Resources/lib/libRlapack.dylib

locale:
[1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] leaflet_1.1.0      ggplot2_2.2.1.9000 cancensus_0.1.5    bindrcpp_0.2      
[5] sf_0.5-5           dplyr_0.7.4        rgdal_1.2-15       sp_1.2-5          

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.13       lattice_0.20-35    class_7.3-14       assertthat_0.2.0  
 [5] rprojroot_1.2      digest_0.6.12      mime_0.5           R6_2.2.2          
 [9] plyr_1.8.4         backports_1.1.0    evaluate_0.10.1    e1071_1.6-8       
[13] httr_1.3.1         rlang_0.1.4        rematch_1.0.1      lazyeval_0.2.1    
[17] curl_2.8.1         rstudioapi_0.7     whisker_0.3-2      callr_1.0.0       
[21] rmarkdown_1.7      pkgdown_0.1.0.9000 desc_1.1.1         labeling_0.3      
[25] devtools_1.13.4    readr_1.1.1        udunits2_0.13      stringr_1.2.0     
[29] htmlwidgets_0.9    munsell_0.4.3      shiny_1.0.3        compiler_3.4.1    
[33] httpuv_1.3.5       pkgconfig_2.0.1    htmltools_0.3.6    highlight_0.4.7.2 
[37] tibble_1.3.4       roxygen2_6.0.1     viridisLite_0.2.0  crayon_1.3.4      
[41] withr_2.1.0.9000   MASS_7.3-47        commonmark_1.4     grid_3.4.1        
[45] jsonlite_1.5       xtable_1.8-2       gtable_0.2.0       DBI_0.7           
[49] magrittr_1.5       units_0.4-6        scales_0.5.0.9000  stringi_1.1.5     
[53] xml2_1.1.1         RColorBrewer_1.1-2 tools_3.4.1        glue_1.2.0        
[57] purrr_0.2.4        hms_0.3            crosstalk_1.0.0    pkgload_0.0.0.9000
[61] yaml_2.1.14        colorspace_1.3-2   classInt_0.1-24    memoise_1.1.0     
[65] knitr_1.17         bindr_0.1         

您必须已升级到 Pandoc 2.0，这是不必要的 https://yihui.name/en/2017/11/pandoc-2/眼下。最简单的修复（也是我推荐的）是删除您自己的 Pandoc 版本。稍微困难的方法是将这个问题报告给作者pkgdown，然后等待修复（对于 Pandoc 2.0），这将类似于修复这里降价 https://github.com/rstudio/rmarkdown/issues/1200. If pkgdown允许自定义CSS，你也可以自己修复它：

.sourceLine {
  display: inline-block;
}