Merge pull request #4962 from yoonghm/patch-1

Rename CPSolver to CpSolver

Author: lperron

ortools/sat/python/cp_model.py

@@ -18,7 +18,7 @@
 
 * [`CpModel`](#cp_model.CpModel): Methods for creating
 models, including variables and constraints.
-* [`CPSolver`](#cp_model.CpSolver): Methods for solving
+* [`CpSolver`](#cp_model.CpSolver): Methods for solving
 a model and evaluating solutions.
 
 The following methods implement callbacks that the