[FIX] *: enforce 1 newline on files end

Part-of: odoo/documentation#2984

content/developer/reference/frontend/assets.rst

@@ -367,4 +367,3 @@ manifest counterparts.
 `sequence` (default= `16`)
     Loading order of the asset records (ascending). A sequence lower than 16 means
     that the asset will be processed *before* the ones declared in the manifest.
-

content/developer/reference/frontend/framework_overview.rst

@@ -646,4 +646,4 @@ bundle `web.assets_tests` in the page. This bundle contains mostly test tours
 users). The `tests` mode is then useful to be able to run these tours.
 
 .. seealso::
-    - `Owl Repository <https://github.com/odoo/owl>`_
+    - `Owl Repository <https://github.com/odoo/owl>`_

content/developer/reference/frontend/icons_library.rst

@@ -2,4 +2,4 @@
 Odoo UI Icons
 =============
 
-.. image:: icons_library/odoo-ui-icons.png
+.. image:: icons_library/odoo-ui-icons.png

content/developer/reference/frontend/javascript_modules.rst

@@ -389,4 +389,4 @@ wait for the promise to complete before registering the module.
             // some code here
             return something;
         });
-    });
+    });

content/developer/reference/frontend/patching_code.rst

@@ -193,4 +193,4 @@ The `patch` function has a counterpart, `unpatch`, also located in `@web/core/ut
 
         patch(object, "patch name", { ... });
         // test stuff here
-        unpatch(object, "patch name");
+        unpatch(object, "patch name");