Note that guard_warnings_filter was added in 2.6

diff --git a/Doc/lib/libtest.tex b/Doc/lib/libtest.tex
index d13bfffc0180d0f61ee550274cc00a44ad4b5f46..811d2f7fc08958abc0695abfa095ec0a550936ea 100644 (file)
--- a/Doc/lib/libtest.tex
+++ b/Doc/lib/libtest.tex
@@ -266,6 +266,8 @@ This does not equal a failure since it could be the path to the file.
 \begin{funcdesc}{guard_warnings_filter}{}
 Returns a context manager that guards the \module{warnings} module's
 filter settings.
+\versionadded{2.6}
+\end{funcdesc}
 
 \begin{funcdesc}{run_unittest}{*classes}
 Execute \class{unittest.TestCase} subclasses passed to the function.