diff --git a/doc/_static/akdoc.css b/doc/_static/akdoc.css
index 1a1ef7a64fe74e3c1eda3d976c5acd38f2a978e2..d8b61e3ff7a358e5d5c0f132b5040ec7c3f43e42 100644
--- a/doc/_static/akdoc.css
+++ b/doc/_static/akdoc.css
@@ -23,17 +23,17 @@ code {
 }
 
 h1 {
-  padding-bottom:5px;
+  padding-bottom:7px;
   border-bottom: 1px solid #ccc;
 }
 
 h2 {
-  padding-bottom:1px;
+  padding-bottom:5px;
   border-bottom: 1px solid #ccc;
 }
 
 h3 {
-  padding-bottom:1px;
+  padding-bottom:5px;
   border-bottom: 1px solid #ccc;
 }
 
diff --git a/doc/tutorial.rst b/doc/tutorial.rst
index 194c3f80edb57950b779326d6fddbf72afb69f1e..d8a982e6cc435d8b077bb6edab0e90f86fe00fac 100644
--- a/doc/tutorial.rst
+++ b/doc/tutorial.rst
@@ -11,7 +11,8 @@ Preparation
 -----------
 
 :mod:`loopy` currently requires on :mod:`pyopencl` to be installed. We
-import a few modules and initialize :mod:`pyopencl`
+import a few modules and set up a :class:`pyopencl.Context` and a
+:class:`pyopencl.CommandQueue`:
 
 .. doctest::
 
diff --git a/loopy/symbolic.py b/loopy/symbolic.py
index 8baa28ed1731bf82933e8e65b9f2a5bdbe0cac3e..4838eda45799f039d67110111fdb1083cf564262 100644
--- a/loopy/symbolic.py
+++ b/loopy/symbolic.py
@@ -275,9 +275,7 @@ class DependencyMapper(DependencyMapperBase):
 
 @memoize
 def get_dependencies(expr):
-    from loopy.symbolic import DependencyMapper
     dep_mapper = DependencyMapper(composite_leaves=False)
-
     return frozenset(dep.name for dep in dep_mapper(expr))