Rollup merge of rust-lang#66763 - Parth:patch-2, r=steveklabnik

Minor edit for documentation-tests.md that increases clarity

Author: tmandry

src/doc/rustdoc/src/documentation-tests.md

@@ -1,7 +1,7 @@
 # Documentation tests
 
 `rustdoc` supports executing your documentation examples as tests. This makes sure
-that your tests are up to date and working.
+that examples within your documentation are up to date and working.
 
 The basic idea is this: