Correct typos and markup errors (Raymond, thanks for texcheck)
diff --git a/Doc/lib/libdl.tex b/Doc/lib/libdl.tex
index 3da4db2..325724c 100644
--- a/Doc/lib/libdl.tex
+++ b/Doc/lib/libdl.tex
@@ -27,7 +27,7 @@
 (\constant{RTLD_NOW}). Default is \constant{RTLD_LAZY}. Note that some
 systems do not support \constant{RTLD_NOW}.
 
-Return value is a \pytype{dlobject}.
+Return value is a \class{dlobject}.
 \end{funcdesc}
 
 The \module{dl} module defines the following constants: