Cross-reference doc chapter from testing chapter

We don't completely cover documentation tests in the testing chapter,
since we cover them in the documentation chapter. So make sure people
know that.

Fixes #28082

diff --git a/src/doc/trpl/testing.md b/src/doc/trpl/testing.md
index 587f60343c344ade265760671c737a344bcd5a33..452dc13c6968dbb3fbf3db2e84b2623fe5ff0a6e 100644 (file)
--- a/src/doc/trpl/testing.md
+++ b/src/doc/trpl/testing.md
@@ -502,3 +502,5 @@ documentation tests: the `_0` is generated for the module test, and `add_two_0`
 for the function test. These will auto increment with names like `add_two_1` as
 you add more examples.
 
+We haven’t covered all of the details with writing documentation tests. For more,
+please see the [Documentation chapter](documentation.html)