Add NEWS entry

[ci skip]
2019-12-12 12:09:16 +00:00 · 2019-12-12 12:09:16 +00:00 · 0d0fe2faac
commit 0d0fe2faac
parent 2d33117c95
1 changed files with 3 additions and 0 deletions
--- a/NEWS.rst
+++ b/NEWS.rst
@ -1,3 +1,6 @@
+- [varLib] Added legible error messages to the ``_add_avar()`` axis mapping duplicate
+  check.
+
 4.2.1 (released 2019-12-06)
 ---------------------------