Some semantic fixes.
diff --git a/Doc/lib/compiler.tex b/Doc/lib/compiler.tex
index f0926e7..d4f4124 100644
--- a/Doc/lib/compiler.tex
+++ b/Doc/lib/compiler.tex
@@ -103,8 +103,7 @@
construct. The root of the tree is \class{Module} object.
The abstract syntax offers a higher level interface to parsed Python
-source code. The \ulink{\module{parser}}
-{http://www.python.org/doc/current/lib/module-parser.html}
+source code. The \refmodule{parser}
module and the compiler written in C for the Python interpreter use a
concrete syntax tree. The concrete syntax is tied closely to the
grammar description used for the Python parser. Instead of a single