style: remove trailing whitespace

Removed all trailing whitespace.

src/jcloud_docsgen/core/python/namespaces.py

@@ -118,7 +118,7 @@ class PythonPackageNamespace(PythonNamespace):
         '''
         Returns the names of all sub-namespaces of the specified package
         namespace and keeps the package structure.
-        
+
         :param package: The package.
         :type package: PythonPackageNamespace
 
@@ -134,12 +134,12 @@ class PythonPackageNamespace(PythonNamespace):
             )
             for sn in package._sub_namespaces
         }
-    
+
     def sub_namespace_names(self) -> PythonPackageNamespaceDictType:
         '''
         Returns the names of all sub-namespaces and keeps the package
         structure.
-        
+
         :return: The names if all sub-namespaces.
         :rtype: PythonPackageNamespaceDictType
         '''
@@ -179,7 +179,7 @@ class PythonPackageNamespace(PythonNamespace):
             'no such namespace',
             namespace_identifier = name
         )
-    
+
     def add(self, namespace: PythonNamespace) -> None:
         '''
         Adds a namespace.