New chapter about class ids.
diff --git a/org.jacoco.doc/docroot/doc/faq.html b/org.jacoco.doc/docroot/doc/faq.html
index 82c4c47..55276bb 100644
--- a/org.jacoco.doc/docroot/doc/faq.html
+++ b/org.jacoco.doc/docroot/doc/faq.html
@@ -61,7 +61,7 @@
with debug information.
</p>
-<h3>Why does the coverage report coverage report not show highlighted source code?</h3>
+<h3>Why does the coverage report not show highlighted source code?</h3>
<p>
Make sure the following prerequisites are fulfilled to get source code
highlighting in JaCoCo coverage reports:
@@ -81,7 +81,8 @@
class at execution time is a different class file. Make sure you're using the
exact same class file at runtime as for report generation. Note that some
tools (e.g. EJB containers, mocking frameworks) might modify your class files
- at runtime.
+ at runtime. Please see the chapter about <a href="classids.html"> class
+ ids</a> for a detailed discussion.
</p>
<h3>Why are Java interface types not shown in the coverage reports?</h3>