fix index entry in hiltercomparison vignette

vignettes/hitlercomparison.Rmd

@@ -2,7 +2,7 @@
 title: "Analysis of vocabulary"
 output: rmarkdown::html_vignette
 vignette: >
-  %\VignetteIndexEntry{funwithdata}
+  %\VignetteIndexEntry{Analysis of vocabulary}
   %\VignetteEngine{knitr::rmarkdown}
   %\VignetteEncoding{UTF-8}
 ---
@@ -170,4 +170,4 @@ hitler_comparison
 Finally, we want to plot our results:
 ```{r, fig.width=7}
 bar_plot_fraktionen(hitler_comparison, percent, fill=fraktion, title="Coincidence of party vocabulary with nazi vocabulary", ylab="unique 'nazi' words per total (unique) fraction words [%]")
-```
+```