Some cleanup in the docs.
diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
index 0f45f94..ea2bb1a 100644
--- a/Doc/reference/expressions.rst
+++ b/Doc/reference/expressions.rst
@@ -105,8 +105,6 @@
 defined truncation may happen.  If the class name consists only of underscores,
 no transformation is done.
 
-.. % 
-.. % 
 
 
 .. _atom-literals:
@@ -979,6 +977,10 @@
 
 
 .. _comparisons:
+.. _is:
+.. _isnot:
+.. _in:
+.. _notin:
 
 Comparisons
 ===========
@@ -1108,6 +1110,9 @@
 
 
 .. _booleans:
+.. _and:
+.. _or:
+.. _not:
 
 Boolean operations
 ==================