give up - there's no way to properly include a valid rmd chunk that l…

…ooks correct in rmd source without rendering it on travis

vignettes/shinyjs-usage.Rmd

@@ -142,15 +142,15 @@ If the Rmd file makes use of [Tabbed Sections](http://rmarkdown.rstudio.com/html
 
 If you're using the [`shiny_prerendered` Rmd format](http://rmarkdown.rstudio.com/authoring_shiny_prerendered.html), you need to include the following code in the beginning of your Rmd file, just after the YAML header:
 
-
-    ```{r, echo=FALSE}
-    shiny::addResourcePath("shinyjs", system.file("srcjs", package = "shinyjs"))
-    ```
-    ```{r, context="server"}
-    shinyjs::useShinyjs(html = TRUE)
-    ```
-    <script src="shinyjs/inject.js"></script>
-
+````
+```{r, echo=FALSE}`r ''`
+shiny::addResourcePath("shinyjs", system.file("srcjs", package = "shinyjs"))
+```
+```{r, context="server"}`r ''`
+shinyjs::useShinyjs(html = TRUE)
+```
+<script src="shinyjs/inject.js"></script>
+````
 
 <h2 id="usage-html">Using shinyjs when the user interface is built using an HTML file/template</h2>