Remove dots in \version{changed,added} argument and
correct argument order.
diff --git a/Doc/ref/ref2.tex b/Doc/ref/ref2.tex
index af79e4d..34e8a9e 100644
--- a/Doc/ref/ref2.tex
+++ b/Doc/ref/ref2.tex
@@ -9,7 +9,7 @@
Python uses the 7-bit \ASCII{} character set for program text.
\versionadded[An encoding declaration can be used to indicate that
-string literals and comments use an encoding different from ASCII.]{2.3}
+string literals and comments use an encoding different from ASCII]{2.3}
For compatibility with older versions, Python only warns if it finds
8-bit characters; those warnings should be corrected by either declaring
an explicit encoding, or using escape sequences if those bytes are binary