[FIX] *: remove trailing whitespaces

Part-of: odoo/documentation#2984

content/developer/reference/backend/reports.rst

@@ -277,7 +277,7 @@ the template, such as data from additional models:
 
 Custom fonts
 ============
-If you want to use custom fonts you will need to add your custom font and the related less/CSS to the ``web.reports_assets_common`` assets bundle. 
+If you want to use custom fonts you will need to add your custom font and the related less/CSS to the ``web.reports_assets_common`` assets bundle.
 Adding your custom font(s) to ``web.assets_common`` or ``web.assets_backend`` will not make your font available in QWeb reports.
 
 Example::

content/developer/reference/backend/views.rst

@@ -422,7 +422,7 @@ Calendar
 --------
 
 Calendar views display records as events in a daily, weekly, monthly or yearly
-calendar. 
+calendar.
 
 .. note:: By default the calendar view will be centered around the current date
    (today). You can pass a specific initial date to the context of the action in