More Jenny feedback

Author: hadley

vignettes/test-fixtures.Rmd

@@ -45,7 +45,7 @@ library(testthat)
 
 ## `local_` helpers
 
-We'll begin by giving you the bare minimum knowledge to change global state *just* within your test. The withr package provides a number of functions that temporarily change the state of the world, carefully undoing the changes when the current function finishes:
+We'll begin by giving you the bare minimum knowledge to change global state *just* within your test. The withr package provides a number of functions that temporarily change the state of the world, carefully undoing the changes when the current function or test finishes:
 
 | Do / undo this              | withr function    |
 |-----------------------------|-------------------|
@@ -82,8 +82,6 @@ local_digits <- function(sig_digits, env = parent.frame()) {
 }
 ```
 
-This is particularly useful when you need to chain together multiple `local_` functions to achieve the desired state.
-
 ## Foundations
 
 Before we go further, let's lay some foundations to help you understand how `local_` functions work. We'll motivate the discussion with a `sloppy()` function that prints a number with a specific number of significant digits by adjusting an R option: