Merge pull request #445 from bashtage/rel-4.27

RLS: Release 4.27

doc/source/changes.rst

@@ -1,16 +1,16 @@
 Change Log
 ==========
 
-Since Version 4.26
-------------------
+Version 4.27
+------------
 * Switched from patsy for formulaic for linear constraint translation when using
   the formula interface. This allows formulas to be specified using a dictionary
   of constraints in addition to the standard single string of list of strings
   (:issue:`439`, :issue:`440`).
 * Fixed a bug when using escaped variable names, e.g., ``y ~ 1 + `x 3```, in panel
   data models (:issue:`435`).
 * Fixed a bug that affected creating IV models using formulas with missing data (:issue:`438`).
-* Fixed examples in documentation (:issue:`434 `).
+* Fixed examples in documentation (:issue:`434`).
 
 Version 4.26
 ------------