better quoting

Author: lorenzwalthert

vignettes/available-hooks.Rmd

@@ -92,11 +92,11 @@ In addition, the hook takes the following arguments that are not passed to
 ```
 
 
-* Argument `cache_root` is passed to `options()` to set `"styler.cache_root"`.
-  Default value: `"styler-perm"`. The argument 
+* Argument `cache_root` is passed to `options()` to set `styler.cache_root`.
+  Default value: `styler-perm`. The argument 
   determines the sub-directory under the {R.cache} cache directory that {styler}
   uses. If you want {styler} to auto-clean up caches older than 6 days, set this
-  to `styler`. For more information, see 
+  to `"styler"`. For more information, see 
   `help("caching", package = "styler")`.
 
 ```