Avoid ANSI escapes on website

Closes #954

Author: IndrajeetPatil

NEWS.md

@@ -32,6 +32,8 @@ editor_options:
 
 **Other**
 
+-   Old (and outdated) vignettes have been removed (\@IndrajeetPatil, #955).
+    To access them, do `git checkout v1.0.0`.
 -   Upgrade testing infra to testthat 3e (\@IndrajeetPatil, #949).
 -   All (R)md files in this project's source code are now formatted with
     default pandoc markdown formatter. This conversion is required when using

vignettes/styler.Rmd

@@ -19,6 +19,8 @@ knitr::knit_engines$set(list(
     )
   }
 ))
+
+options(styler.colored_print.vertical = FALSE)
 ```
 
 # Entry-points