Clarify section about source code encoding.
diff --git a/Doc/tutorial/interpreter.rst b/Doc/tutorial/interpreter.rst
index 25380e4..5140b43 100644
--- a/Doc/tutorial/interpreter.rst
+++ b/Doc/tutorial/interpreter.rst
@@ -185,8 +185,8 @@
For example, to write Unicode literals including the Euro currency symbol, the
ISO-8859-15 encoding can be used, with the Euro symbol having the ordinal value
-164. This script will print the value 8364 (the Unicode codepoint corresponding
-to the Euro symbol) and then exit::
+164. This script, when saved in the ISO-8859-15 encoding, will print the value
+8364 (the Unicode codepoint corresponding to the Euro symbol) and then exit::
# -*- coding: iso-8859-15 -*-