Add a message in the changelog and update contributors.txt

Author: Pierre-Sassoulas

CONTRIBUTORS.txt

@@ -286,11 +286,7 @@ contributors:
 
 * Michael Scott Cuthbert: contributor
 
-* Pierre Sassoulas : contributor
-    - Made C0412 (ungrouped import) compatible with isort
-    - Made multiple message with the same old name possible
-    - Made Pylint a little faster by refactoring the message store
-    - Broke down "missing-docstrings" between "module", "class" and "function"
+* Pierre Sassoulas : maintainer, contributor
 
 * Nathan Marrow
 

ChangeLog

@@ -11,13 +11,19 @@ Release date: TBA
   is not returning explicitly while the other do.
 
   Closes #3468
-  
+
 * Fix ``useless-super-delegation`` false positive when default keyword argument is a dictionnary.
 
   Close #3773
 
 * Fix a crash when a specified config file does not exist
 
+* There is now less false positives for `len-as-conditions` for classes that are not inheriting directly from list,
+dict, or set, like pandas's DataFrame or numpy's Array. Additionally, if the `__bool__` function is implemented, the
+message will  not be raised even  for child of those classes.
+
+  Close #1879
+
 What's New in Pylint 2.6.0?
 ===========================
 

doc/whatsnew/2.7.rst

@@ -0,0 +1,19 @@
+**************************
+ What's New in Pylint 2.7
+**************************
+
+:Release: 2.7
+:Date: 202?
+
+
+Summary -- Release highlights
+=============================
+
+
+New checkers
+============
+
+Other Changes
+=============
+
+* `len-as-conditions` is now triggered only for classes that are inheriting directly from list, dict, or set and not implementing the `__bool__` function, or from generators like range or list/dict/set comprehension. This should reduce the false positive for other classes, like pandas's DataFrame or numpy's Array.