Normalize on 'After reading this guide, you will know:'

We have three or four different introduction sentences to the guides.
After this commit, we use the same one everywhere.

1 files changed, 3 insertions, 1 deletions

diff --git a/guides/source/active_support_instrumentation.md b/guides/source/active_support_instrumentation.md
index fd3a179726..cf5a51fc5b 100644
--- a/guides/source/active_support_instrumentation.md
+++ b/guides/source/active_support_instrumentation.md
@@ -3,7 +3,9 @@ Active Support Instrumentation
 
 Active Support is a part of core Rails that provides Ruby language extensions, utilities and other things. One of the things it includes is an instrumentation API that can be used inside an application to measure certain actions that occur within Ruby code, such as that inside a Rails application or the framework itself. It is not limited to Rails, however. It can be used independently in other Ruby scripts if it is so desired.
 
-In this guide, you will learn how to use the instrumentation API inside of Active Support to measure events inside of Rails and other Ruby code. We cover:
+In this guide, you will learn how to use the instrumentation API inside of Active Support to measure events inside of Rails and other Ruby code.
+
+After reading this guide, you will know:
 
 * What instrumentation can provide.
 * The hooks inside the Rails framework for instrumentation.