title: R kable won't print in Markdown document
body: <p>I have recently tried to use the kable package for tables, and while I'm quite satisfied of the results I'm getting in R scripts, I can't figure out how to use them in an R Markdown file.</p>
  
  <p>Here is a short example of a table that does work in a R script, but won't when I try to reproduce it in a Markdown document.</p>
  
  <pre><code>data(mtcars)
  
  mtcars
  
  ## @knitr install
  
  check_and_install &lt;- function( packname ) { # given package name, check installation, install if not found
    if ( packname %in% rownames(installed.packages()) == FALSE ) {
  install.packages( packname, repos="http://cran.rstudio.com/"  )
    }
  }
  
  check_and_install("kableExtra")
  check_and_install("dplyr")
  check_and_install("qwraps2")
  check_and_install("reprex")
  
  library(kableExtra)
  library(dplyr)
  library(qwraps2)
  library(reprex)
  
  ## Tableau
  
  summary_test  &lt;-
    list("Cylindres" =
       list("Huit" = ~ qwraps2::n_perc0(cyl == 8,show_symbol=TRUE),
            "Six" = ~ qwraps2::n_perc0(cyl == 6,show_symbol=TRUE),
            "Quatre"  = ~ qwraps2::n_perc0(cyl == 4,show_symbol=TRUE)),
     "Vitesses" =
       list("Cinq" = ~ qwraps2::n_perc0(gear == 5,show_symbol=TRUE),
            "Quatre" = ~ qwraps2::n_perc0(gear == 4,show_symbol=TRUE),
            "Trois" = ~ qwraps2::n_perc0(gear == 3,show_symbol=TRUE))
    )
  
  
  
  tabtest2&lt;-summary_table(dplyr::group_by(mtcars, am), summary_test)
  
  
  kable_out &lt;- kable(tabtest2, format = "html", caption = "",     col.names=c("Auto","Manuelle"), booktabs = T, full_width = F) %&gt;%
    kable_styling(bootstrap_options = c("striped", "hover")) %&gt;%
    kableExtra::group_rows("Cylindres", 1, 3) %&gt;%
    kableExtra::group_rows("Vitesses", 4, 6) 
  
  kable_out
  </code></pre>
  
  <p>Now as for the next step, I want to include this tab in a R-markdown document, ideally the output would be a word file. And this is where I'm having problems : I can't find a way to include it properly. Markdown completely messes up the formatting in the word output. Please note that there is no issue if I switch the output to HTML... unfortunately I have to provide a word document for now so that's not an option.</p>
  
  <pre><code>---
  title: "Test2"
  author: "MJ"
  date: "14 mars 2019"
  output: word_document
  always_allow_html: yes
  ---
  
  ```{r setup, include=FALSE}
  knitr::opts_chunk$set(cache = FALSE, include = FALSE)
  library(knitr)
  opts_chunk$set(echo = FALSE, cache=FALSE)
  read_chunk('C:/Users/Mathieu/Desktop/indicateurs pps/Test SO.R')
  ```
  
  
  ```{r install, include=FALSE}
  ```
  
  ## Analyse comparative
  
  
  ```{r table1, include=T}
  knitr::kable(tabtest2, format = "html", caption = "",     col.names=c("Auto","Manuelle"), booktabs = T, full_width = F) %&gt;%
    kable_styling(bootstrap_options = c("striped", "hover")) %&gt;%
    kableExtra::group_rows("Cylindres", 1, 3) %&gt;%
    kableExtra::group_rows("Vitesses", 4, 6) 
  
  
  kable_out
  ```
  </code></pre>
  
  <p>No issues at all when creating the document, everything seems to run smoothly...</p>
  
  <p>I've been looking into it for a while and I just can't figure out what's wrong. Any leads someone ?</p>
  
  <p>Thanks in advance</p>