Make sure there are no weird nesting behaviors; the PDF version will not

format if there are (building the "bookmarks" for the reader breaks).

Doc/lib/compiler.tex

@@ -30,7 +30,7 @@ The following modules are part of the \refmodule{compiler} package:
 \localmoduletable
 
 
-\subsection{The basic interface}
+\section{The basic interface}
 
 \declaremodule{}{compiler}
 
@@ -67,7 +67,7 @@ The \module{compiler} package contains the following modules:
 \module{misc}, \module{pyassem}, \module{pycodegen}, \module{symbols},
 \module{transformer}, and \refmodule[compiler.visitor]{visitor}.
 
-\subsection{Limitations}
+\section{Limitations}
 
 There are some problems with the error checking of the compiler
 package.  The interpreter detects syntax errors in two distinct