standardize module docstring

pina/problem/abstract_problem.py

@@ -1,4 +1,4 @@
-"""Module for the AbstractProblem class"""
+"""Module for the AbstractProblem class."""
 
 from abc import ABCMeta, abstractmethod
 from copy import deepcopy

pina/problem/inverse_problem.py

@@ -1,4 +1,4 @@
-"""Module for the InverseProblem class"""
+"""Module for the InverseProblem class."""
 
 from abc import abstractmethod
 import torch

pina/problem/parametric_problem.py

@@ -1,4 +1,4 @@
-"""Module for the ParametricProblem class"""
+"""Module for the ParametricProblem class."""
 
 from abc import abstractmethod
 

pina/problem/spatial_problem.py

@@ -1,4 +1,4 @@
-"""Module for the SpatialProblem class"""
+"""Module for the SpatialProblem class."""
 
 from abc import abstractmethod
 

pina/problem/time_dependent_problem.py

@@ -1,4 +1,4 @@
-"""Module for the TimeDependentProblem class"""
+"""Module for the TimeDependentProblem class."""
 
 from abc import abstractmethod