bug #3634 Fix goal of “framework.profiler.only_exceptions“ option which profile on each exceptions on controller (not only 500) (stephpy)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #3634).

Discussion
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Fix goal of “framework.profiler.only_exceptions“ option which profile on each exceptions on controller (not only 500)

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.*

See symfony/symfony#10375 (comment)

Commits
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0ea5639 Fix goal of “framework.profiler.only_exceptions“ option which profile on each exceptions on controller (not only 500)

Author: weaverryan

Diff for: book/internals.rst

@@ -644,7 +644,7 @@ If you enable the web profiler, you also need to mount the profiler routes:
 
 As the profiler adds some overhead, you might want to enable it only under
 certain circumstances in the production environment. The ``only_exceptions``
-settings limits profiling to 500 pages, but what if you want to get
+settings limits profiling to exceptions, but what if you want to get
 information when the client IP comes from a specific address, or for a limited
 portion of the website? You can use a Profiler Matcher, learn more about that
 in ":doc:`/cookbook/profiler/matchers`".