style: format URL paths for consistency in spacing

Author: liuruibin

apps/knowledge/urls.py

@@ -43,11 +43,11 @@
     path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/batch_delete', views.ParagraphView.BatchDelete.as_view()),
     path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/batch_generate_related', views.ParagraphView.BatchGenerateRelated.as_view()),
     path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/migrate/knowledge/<str:target_knowledge_id>/document/<str:target_document_id>', views.ParagraphView.BatchMigrate.as_view()),
-    path( 'workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/association', views.ParagraphView.Association.as_view()),
-    path( 'workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/unassociation', views.ParagraphView.UnAssociation.as_view()),
+    path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/association', views.ParagraphView.Association.as_view()),
+    path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/unassociation', views.ParagraphView.UnAssociation.as_view()),
     path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/<str:paragraph_id>', views.ParagraphView.Operate.as_view()),
     path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/<str:paragraph_id>/problem', views.ParagraphView.Problem.as_view()),
-    path( 'workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/<int:current_page>/<int:page_size>', views.ParagraphView.Page.as_view()),
+    path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/document/<str:document_id>/paragraph/<int:current_page>/<int:page_size>', views.ParagraphView.Page.as_view()),
     path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/problem', views.ProblemView.as_view()),
     path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/problem/batch_delete', views.ProblemView.BatchDelete.as_view()),
     path('workspace/<str:workspace_id>/knowledge/<str:knowledge_id>/problem/batch_association', views.ProblemView.BatchAssociation.as_view()),