Issue #19344: fix markup error in whatsnew
Thanks to Marius Gedminas
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
index 8e4f8e6..5e22679 100644
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -613,7 +613,7 @@
   LINEAR_PROBES to be any value.  Set LINEAR_PROBES=0 to turn-off
   linear probing entirely.
 
-  (Contributed by Raymond Hettinger in :issue"`18771`.)
+  (Contributed by Raymond Hettinger in :issue:`18771`.)
 
 * The interpreter starts about 30% faster. A couple of measures lead to the
   speedup. The interpreter loads fewer modules on startup, e.g. the :mod:`re`,