Make it clear that Demo/embed/ is from the source distribution.
diff --git a/Doc/ext/ext.tex b/Doc/ext/ext.tex
index 2640250..93f8232 100644
--- a/Doc/ext/ext.tex
+++ b/Doc/ext/ext.tex
@@ -1706,7 +1706,7 @@
 Python objects.
 
 A simple demo of embedding Python can be found in the directory
-\file{Demo/embed}.
+\file{Demo/embed/} of the source distribution.
 
 
 \section{Embedding Python in \Cpp{}