Document when unittest was added to Python.

diff --git a/Doc/lib/libunittest.tex b/Doc/lib/libunittest.tex
index 980d706e59b5a5eaba602b201e74ab1b19fe4257..1cd2857136e69ba215f7838aecd43b37eaa88bf1 100644 (file)
--- a/Doc/lib/libunittest.tex
+++ b/Doc/lib/libunittest.tex
@@ -7,6 +7,7 @@
 \sectionauthor{Steve Purcell}{stephen\textunderscore{}purcell@yahoo.com}
 \sectionauthor{Fred L. Drake, Jr.}{fdrake@acm.org}
 
+\versionadded{2.1}
 
 The Python unit testing framework, often referred to as ``PyUnit,'' is
 a Python language version of JUnit, by Kent Beck and Erich Gamma.