Add a 'whats_new' entry

afvincent · afvincent · commit 0195beb3b00a · 2017-08-25T09:39:45.000-07:00
diff --git a/doc/users/whats_new/EngFormatter_new_kwarg_sep.rst b/doc/users/whats_new/EngFormatter_new_kwarg_sep.rst
@@ -0,0 +1,10 @@
+New keyword argument 'sep' for EngFormatter
+-------------------------------------------
+
+A new "sep" keyword argument has been added to
+:class:`~matplotlib.ticker.EngFormatter` and provides a means to define
+the string that will be used between the value and its unit. The default
+string is " ", which preserves the former behavior. Besides, the separator is
+now present between the value and its unit even in the absence of SI prefix.
+There was formerly a bug that was causing strings like "3.14V" to be returned
+instead of the expected "3.14 V" (with the default behavior).
