Issue #2789909 by vaplas, Lendude, lucur, dawehner: Remove spaces around row.content

core/modules/views/templates/views-view-grid.html.twig

core/modules/views/templates/views-view-list.html.twig

.../modules/views/templates/views-view-unformatted.html.twig

...dules/views_test_data/views_test_data.views_execution.inc

...modules/views/tests/src/Kernel/Plugin/DisplayPageTest.php

core/themes/classy/templates/views/views-view-grid.html.twig

core/themes/classy/templates/views/views-view-list.html.twig

...s/classy/templates/views/views-view-unformatted.html.twig

core/themes/stable/templates/views/views-view-grid.html.twig

core/themes/stable/templates/views/views-view-list.html.twig

...s/stable/templates/views/views-view-unformatted.html.twig